watermaker yacht

5 Best Watermakers for Sailboats

Last Updated by

Daniel Wade

June 15, 2022

With the right Watermaker, the ocean becomes an almost immeasurable supply of fresh and clean drinking water to keep you hydrated during your offshore sailing adventures.

Many sailors do spend a lot of their time and money on various parts of the sailboat including the sails, engine, electronics, and generators especially when preparing for long-distance voyages.

While there's absolutely nothing wrong with this, they often overlook one crucial part of general human survival: having an ample supply of fresh drinking water.

Whether you have freshwater drinking tanks on your sailboat or planning to cruise in areas where you can easily access clean drinking water, the hassle involved in having to come to the dock to fill the water tanks can be quite overwhelming.

This is exactly why you need to find the best watermakers for sailboats.

Like many other nautical technologies, watermakers have significantly advanced in the last few decades to become very efficient and more reliable. They're no longer a luxury on your sailboat but a necessity. Better still, watermakers have become relatively affordable and are meant to keep you hydrated as you explore areas that do not have clean and fresh drinking water.

In this article, we'll take a look at how watermaker systems work, highlight its benefits, and highlight the best sailboat watermakers on the market right now. At the end of this read, you should be able to choose the best watermaker for your sailboat.

Table of contents

Benefits of Having a Watermaker on Your Sailboat

The freedom and security that come with having full water tanks on your sailboat are of immense importance, especially if you're cruising in an area where fresh drinking water is hard to come by and quite expensive when you do. As such, having a watermaker aboard your sailboat is no longer a luxury like it used to be in the past. With a steady supply of fresh and clean water, your life on the sailboat will be a lot better. This is because you'll have enough clean water to drink, cook, wash, and shower, which is beneficial if you want to enjoy your sailing adventures.

Honestly speaking, many sailors do not actually need a watermaker. Well, if you're planning to sail just near the shores, then there's a chance that you can easily access fresh and clean water by the dock. But this can be limiting if you've been dreaming of going off the grid and sailing to some exotic and unknown places in the world.

With that in mind, a watermaker makes a lot of sense to most sailors. You won't have to worry about having to carry aboard gallons of fresh water for cooking and drinking during your voyage. You won't have to treat freshwater as a precious commodity that must last until you can refill at the next port. With a watermaker, you can simply go ocean crossing without worrying about running out of water.

A watermaker allows you to have a steady supply of fresh and clean water to keep everybody well-hydrated and healthy. You can clean the water anytime you feel like and all you have to do is replace the filter once in a while and you'll be good to go. In essence, a watermaker is probably one of the most important equipment to have aboard your sailboat, so installing it is of great importance if you're a serious sailor.

The Basics of Modern Marine Watermakers

Modern marine watermakers essentially follow the principle of reverse-osmosis to produce pure, drinking water from seawater. During this process and through very high pressure, seawater is forced through a semipermeable membrane that only allows freshwater molecules to pass through it but not salt, bacteria, or any other organic material. The newly made pure, drinking water is then piped to the sailboat's water tanks while the leftover (brine) is discharged overboard.

Even though marine watermakers may differ in the type of pump that's employed and how it is driven, this is one of the most important features in every watermaker. In most cases, water can be electrically pumped or powered directly off the boat's engine. If you have an AC generator or alternator on your boat, it would make much sense to use the AC output to drive the watermaker directly. You can also choose the DC-powered models if you rely on renewable energy from solar or wind. Alternatively, you can still go for AC-powered watermakers but you'll have to buy an inverter.

All in all, DC-powered watermakers are more efficient since they integrate a power-saving energy recovery system (ERS). You must, however, keep in mind that your energy consumption levels might be quite high if you're sailing in colder and saltier areas. This is because the water purification process might be a bit slower in such areas. As such, you should consider investing in a more high-powered watermaker system if you will be sailing in colder and saltier areas than if you're planning to sail more in warm and less salty areas.

As far as an engine-driven watermaker is concerned, you should mount the high-pressure pump on the engine so that it can be belt-driven using an automatic clutch. An engine-driven watermaker should be your first option if you want large quantities of fresh drinking water. This is more productive than AC or DC-powered watermakers. Even with a relatively small engine, this setup has an automatic regulator that constantly pumps the water. With that in mind, engine-driven watermakers are ideal if you want to reduce your energy consumption. To put it into perspective, an engine-driven watermaker can lower energy consumption by an enormous 80%, especially when compared with conventional AC or DC-powered watermaker systems.

How to Choose the Best Watermaker for Your Sailboat

There are many factors to consider when looking for the best watermakers for your sailboat. Here are the most important things to consider.

Your Freshwater Needs

One of the most important things to consider before spending your money on a watermaker is your freshwater needs. What quantity would be enough to keep you going on your sailing adventure? While the quantity might differ from one sailor to the other or from one boat to the other, you should consider the number of gallons that a particular watermaker can produce per day. This will help you in choosing the ideal watermaker; a model that will ensure that you never run out of water. Do not underestimate your water needs, especially if you're planning to sail with your children or if you're planning to stay on the boat for an extended period of time.

Do you have enough space on your vessel to accommodate the type of watermaker you're looking to buy? While most watermakers are designed to fit in the smallest of space, you should consider the actual size of the watermaker and find out whether you have enough space on your vessel to fix it.

Watermakers can run on electricity, renewable energy such as wind and solar (if you have them on your vessel), or both. When looking for the perfect watermaker, you should consider how to power it and whether or not the watermaker has low-energy consumption, which is definitely a great feature. Again, there are also engine-driven watermakers, so it's important to know exactly what you're going for.

Maintenance

Watermakers have a reputation for being difficult to maintain. Fortunately, the equipment and components have improved in the last few years so you should go for a model that's easy to maintain. You should use the watermaker in water bodies that look good, You should avoid using the watermaker in dirty harbors as you may have to change the filters every so often or even damage your watermaker altogether.

Best Watermakers for Sailboats

Let's take a look at the best watermakers available on the market right now.

The Ultra Whisper

Engineered by limited electrical options that can run on either DC or AC, THE Ultra Whisper by Sea Recovery is one of the best watermakers currently available on the market. In addition to being very quiet, this watermaker features an automatic operation that requires very minimal operator adjustment.

This watermaker is ideal for small powerboats and sailboats since it can serve as an efficient water supply. This model boasts about a 75% reduction in power consumption, especially when compared to other models.

• ‍ Smooth and quiet water production
• Can produce up to 2,280 liters per day
• Ideal for small boats
• It is energy efficient
• ‍ It might not be perfect for large boats

Echotec Watermaker

If you want a watermaker model that can produce 60 liters per hour flawlessly and with no maintenance apart from changing the filters, look no further than the Echotec Watermaker. This model is designed for ultra-reliable performance and easy customer installation.

This watermaker is made from high-quality components that can withstand the continuous harsh marine environment, making it one of the most durable watermakers on the market. This is essentially a series of modular watermakers ranging from 12-volt to 24-volt DC-powered models. They bring forth energy efficiency, a computerized energy recovery system, and ultimate reliability to ensure that you never run out of fresh drinking water while out there on the sea.

• ‍ Energy efficient
• Cost-effective
• ‍ Comes with a very low speed
• Not ideal for large boats

Spectra Katadyn PowerSurvivor

As a compact and energy-efficient watermaker, the Spectra Katadyn PowerSurvivor is arguably the most affordable watermaker currently available on the market. We are talking about a model that only requires 4 amps to desalinate water for your sailboat. It can produce 1.5 gallons of fresh drinking water per hour, which is an excellent return for a watermaker of its size.

It is also one of the most portable watermakers around. You can choose to either install it permanently or temporarily in case you want to take it somewhere else. This portability is also essential if you're looking for a space-saving model that can fit in the smallest of compartments. Its simple but rugged design is essential in ensuring that it can perform at its best even in harsh marine conditions. In terms of its power capabilities, this is the only model on the market that will convert to a hand-operated system or manual power if there's a power shortage.

• ‍ Portable and lightweight
• Rugged design to withstand harsh marine environments
• Efficient and reliable
• Can revert to manual power if there's a power shortage
• Perfect for off-grid sailing
• ‍ Gasoline or diesel can easily damage the semi-permeable membrane

Village Marine - Little Wonder Series

Whether you're looking for a watermaker for your small sailboat or looking for a watermaker that can efficiently serve those huge yachts, the Village Marine Little Wonder Series provides everything. This model is meant for experienced sailors who are looking for various capacity options. This watermaker weighs just about 69 pounds but can produce nearly 180 gallons of fresh drinking water each day.

Designed with a low RPM high-pressure pump, this model remains one of the most efficient and economical watermakers on the market. That's not all; this watermaker is designed with corrosion-resistant features and is one of the most serviceable watermakers in the game. It is reliable, quiet, and portable; all factors that make a watermaker great.

• ‍ Easy to operate
• Corrosion-resistant
• Easy to maintain
• Quiet and versatile
• ‍ It doesn't have automatic adjustment controls

Ventura 150 Watermaker

This is one of the most versatile watermakers on the market. It can use both electricity and renewable energy. This model is engineered to be lightweight and energy-efficient and its compact and modular design makes it a great option if you're looking for a watermaker that's easy to use and install in confined spaces.

The Ventura 150 watermaker is highly efficient as it can produce over 6 gallons of water an hour, which makes it quite perfect for small vessels. This sailboat watermaker features a controller that allows you to operate and monitor the device remotely. It also has the auto store button that will automatically flash the system after every five days.

This watermaker is quiet and surprisingly compact despite its ability to produce about 150 gallons of water per day. It also gives you the option of going for the automated manual or manual model.

• ‍ Very versatile
• Can use both electricity and renewable energy power
• It is smooth and quiet
• It is compact and lightweight
• ‍ The manual model has analog controls

To this end, it's easy to see that having an ideal watermaker aboard your vessel is one of the first crucial steps towards being self-sufficient and sustainable. With a watermaker, you'll be able to access fresh drinking water at all times when sailing even in far-flung places. Most of these models are well-constructed and incorporate some of the best technologies that make them efficient, reliable, and easy to install, use, and maintain.

So when it comes to choosing the best watermaker for your sailboat, it may all come down to what is ideal for you in terms of energy consumption, efficiency, the quantity of water produced, among many other things. With an ideal watermaker, you can remain off the grid for as long as you want without ever worrying about running out of water and this is of great importance in enjoying your sailing adventures.

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I've personally had thousands of questions about sailing and sailboats over the years. As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing.

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Home » Blog » Gear » Watermakers: a guide to marine desalinators and making water on a boat

Watermakers: a guide to marine desalinators and making water on a boat

By Author Fiona McGlynn

Posted on Last updated: March 23, 2022

There’s something magical about a watermaker—at least that’s how I felt after we installed one on our boat. That may sound overblown, but think about it: watermakers transform salt water into fresh water, providing a near-endless supply of potable water for drinking, bathing, and cleaning! THAT my friends is an amazing piece of technology!

(If you don’t share my enthusiasm, try going without a shower for a few days and you’ll begin to see my point).

Having experienced living on a boat and cruising, both with and without a marine desalinator, I can attest that it’s a game-changing piece of gear. However, you definitely don’t need one to go cruising. There are plenty of low-tech ways to collect and make water on a boat.

Marine desalinators do offer some major benefits: there’s more water for showers, it’s easier to travel farther afield, you can spend more time in a remote location. However, these benefits have to be weighed against the drawbacks: namely a hefty price tag and ongoing maintenance.

Deciding whether a watermaker is right for you will come down to the type of cruising you’re doing, how much water you need, and your budget. Read on to learn about the pros and cons, costs, and key features of marine watermakers.

Table of contents

• 1 How does a watermaker work?
• 2.1 Benefits
• 2.2 Drawbacks
• 3.1 Powered or handpump
• 3.2 Electric or engine drive
• 3.3 Energy recovery watermaker
• 3.4 Modular, self-contained, and portable watermakers
• 3.5 Automatic flushing systems
• 3.6 Automatic Pressure Regulation and adjustable pump speed
• 3.7 Remote control panels
• 4 Top watermaker brands

How does a watermaker work?

A watermaker on a yacht converts seawater into fresh water through a process known as reverse osmosis (RO). A high-pressure pump pushes seawater through a semi-permeable membrane that filters out salt, organics, and bacteria. The fresh water is pumped into your water tanks while the remaining brine bi-product is discharged over the side of the boat, back into the ocean.

Marine watermakers: the benefits and drawbacks

Less water rationing.

When we started our 13,000 mile trip across the Pacific, we didn’t have a watermaker. We were on a tight budget and decided to prioritize other pieces of equipment like a life raft and wind vane.

As a result, we became experts in conserving water on a boat . We would carefully ration out water for washing dishes, taking showers, and even brushing our teeth!

After getting a watermaker we became far less meiserly because we knew we could always make more water if we needed to. It was a relief to not be constantly thinking about how much water we were using over the course of a day.

That being said, we couldn’t relax completely. We had to keep our tanks topped up, so as not to run the pump dry. We also always carried potable water in reserve, in case our watermaker broke in the middle of a long passage.

More luxuries

Can’t live without a proper shower? A boat water maker can make water-intensive luxuries like freshwater deck washdown, freshwater flushing heads, laundry, daily showers, and even baths, a possibility.

As great as this sounds in theory, we were surprised to find that we didn’t indulge in more showers after we got the watermaker.

We continued to use a hand pump pesticide sprayer to shower on deck despite having a watermaker and shower below. While some of this came down to habit, we also disliked running our engine (and consuming diesel) just to run the watermaker.

No hauling water

For us, this was by far the greatest benefit of having a watermaker!

While cruising in the US and Canada, we could refill our water tanks at a dock or marina. This was a minor hassle because it involved pulling up the anchor and docking the boat.

In Mexico, it was more challenging to get water. We would fill 5-gallon jugs at the local water purification plant in town and wheel them back to our boat on a collapsible dolly.

It often took a couple of trips with the dolly and dinghy to fill our water tanks. Oh, and we broke our dolly, twice!

We realized that if we wanted to spend more time exploring, and less time hauling water, we would have to invest in a watermaker. When we reached La Paz, Mexico we bought a refurbished watermaker, and we were so glad we did!

Our sailboat water maker gave us the gift of time, especially in places like Mexico and the South Pacific, where there were limited opportunities to fill water tanks up at the docks. It also saved us paying docking and water fees.

We estimate that our boat water maker saved us anywhere from four to six hours every week, time that we could spend exploring the wonderful places we were visiting.

A clean, safe water source

In places where the drinking water may be suspect, a boat water maker can be a reliable source of safe drinking water (assuming it’s in good working condition!).

More time in remote locations

A watermaker is a great tool if you’re drawn to remote locations where you might be the only boat in the anchorage.

It wasn’t until we reached Los Frailes, a secluded village on the Baja, that we really began to think about buying a watermaker.

There we were in an idyllic anchorage, surrounded by spectacular hiking and fishing. There was only one problem—every two days we had to walk 10 miles into town with our water jugs and hope that some kind samaritan would give us a lift back to our boat.

Before having a watermaker, we’d often leave a place we loved just because we needed to fill up our tanks. With a watermaker, we were more self-sufficient and could stay an extra few days, or as long as we wanted!

The number one drawback is the cost. We were able to find a refurbished water desalinator for $3,000, which was a great deal but also a considerable slice out of our cruising kitty.

How much does a watermaker cost?

Powered desalination systems for your average recreational cruising boat range from around 3,500 USD to 11,000 USD, with the more expensive options offering higher production (gallons of fresh water per hour).

Ongoing maintenance

Watermakers are yet another piece of boat equipment that needs to be maintained.

The majority of watermaker problems are caused by not using it enough or not using it properly.

If a watermaker is not used for a few weeks, the planktonic organisms in the seawater will die, rot, and clog the membrane and filters. This can eventually damage the reverse osmosis membrane in the watermaker.

For this reason, boat water makers should be used frequently and regularly flushed with fresh water.

Watermaker flushing

Check your manufacturer’s instructions on how to flush.

Rainman recommends flushing the seawater out of the system with fresh water if you are not using the system for more than a day or two. After another week, you need to freshwater flush the system again or pickle it for long-term storage.

Of course, it’s easy to forget, so we made it a rule to freshwater flush our watermaker after every use.

This is one good reason to choose a watermaker with an output that will meet your water consumption needs but not exceed them. If you’re using it every second day, you won’t have to try and remember whether you’ve flushed it or not.

Flushing a watermaker is relatively simple but it does involve a bit of work. We used a system with buckets of fresh water to flush our system and it generally took about 5 minutes.

You can also buy systems that automatically flush your watermaker at pre-determined times—even when you’re away from the boat (more on autoflush systems below).

Whatever you do, don’t use chlorinated water to flush as it will destroy reverse osmosis membranes. It’s possible to buy a carbon filter to remove chlorine from water sources at the dock.

Pickling a watermaker

If you don’t plan on using your watermaker for a while it needs to be “pickled” with a special biocide to prevent growth and buildup which could render your reverse osmosis membrane totally useless.

A watermaker should also be pickled every so often to chemically cleanse the membrane.

In addition to flushing and pickling, you will also need to clean out and replace the raw water pre-filters.

Operating costs

When properly cared for, a membrane should last five to ten years. If you don’t properly flush or pickle your watermaker, it can be a lot sooner and membranes aren’t cheap, generally costing in the range of 200-700 USD.

You’ll also need to purchase pre-filters and pickling solution, which are generally quite affordable. It’s also a good idea to carry spare parts

Power consumption

Watermakers can be real power hogs. When Practical Sailor tested a dozen DC watermakers they found they could draw anywhere from 12 to 48 watts per gallon, a huge range in efficiency!

According to Practical Sailor, “for maximum efficiency none of the systems drawing 15 amps or more should be operated without running the engine at the same time.”

We had to run our engine for hours to fill our tanks, which was annoying (and loud) when we were hanging out at anchor and also used up another finite resource—diesel fuel.

In our view, this was the single largest drawback to having a watermaker aboard.

Keep in mind that your power supply will determine what type of watermaker you buy. You may need to upgrade your electrical panels, get a generator or high-powered alternator, add solar panels, or increase battery capacity to supply the demand.

You can’t make water everywhere

While watermakers offer great flexibility and freedom, you can’t just make water in any old spot. If you make water in a polluted marina or anchorage, you’ll risk clogging up your filter. Most cruisers will head out to open water to ensure the saltwater they’re using is as clean as possible.

Key features to look for

Powered or handpump, handpump watermakers.

Handpump watermakers tend to be small and portable, the perfect thing to keep in your ditch bag in the event of an emergency. They’re less expensive than powered watermakers and produce far less water, usually around one gallon per hour.

Though I do know cruisers who have used a handpump watermaker for everyday use, they typically tend to be kept aboard for survival situations.

Powered watermakers

Powered watermakers run off your electrical supply or engine and can produce tens of gallons of water per hour. They tend to be a lot more expensive, but they’re productive enough to replenish your tanks.

Electric or engine drive

Powered watermakers can be electrically driven, by AC or DC, or run off the boat engine.

AC watermakers

AC models can produce in the range of 20-60 gph and are ideal for cruisers with an AC generator or alternator on board. They can also be used on boats with ample solar or wind sources and an inverter.

DC watermakers

DC watermaker systems typically produce in the range of 10-30 gph and are ideal for boats with solar power or 12V battery power.

Engine-driven watermakers

On an engine-driven watermaker, the high-pressure pump is belt-driven. These can produce a considerable amount of water, even on small engines. For instance, engine-driven units produce between 20-60gph, twice what a DC unit can produce.

Energy recovery watermaker

DC watermakers have become more efficient in recent years thanks to energy recovery systems (ERS). When the water leaves the watermaker it is still under pressure. ERS uses a set of valves to make use of this excess pressure to help drive the pump, which can reduce energy consumption by as much as 80 percent.

Modular, self-contained, and portable watermakers

Watermakers can be bought as modular, self-contained, and portable units. Choosing the right one may depend on your boat size and layout and whether you’re comfortable installing the watermaker yourself.

Modular units

Modular units come as several separate components that you can mount and connect yourself. This obviously offers a lot more flexibility and is particularly useful on smaller vessels where you may not have a lot of space. The downside is that these systems will take longer to install.

Self-contained units

Self-contained units arrive pre-assembled. While easier to install, they’re often bulkier and best suited to a bigger cruising sailboat with a large engine room.

Portable watermakers

Portable watermaker systems, like the Rainman watermakers, are entirely self-contained. Their compact design makes them easy to move and stow and you can completely avoid a permanent installation.

Simply put the intake and brine discharge hoses overboard, the freshwater hose in your water tank and you’ll be making water in no time.

If you race, have multiple boats, or plan on selling your boat, a portable watermaker is a great option because it can be easily moved from boat to boat.

If we were to buy another watermaker, we would probably opt for a portable one.

Automatic flushing systems

Automatic flushing systems use your boat’s freshwater supply to flush the watermaker for several minutes every few days. These systems require additional components (e.g., a timer, carbon filters, and a motorized valve) and installation but they take a lot of the maintenance out of having a watermaker onboard.

Automatic Pressure Regulation and adjustable pump speed

Your watermaker’s efficiency will be affected by the temperature and salinity of the water you’re cruising in. Cold and highly saline waters (e.g., in the high latitudes) will be more work for your watermaker, so it will take longer to purify.

Some units feature Automatic Pressure Regulation (APR) and adjustable pump speed which can help compensate for fluctuations in water temperature and salinity.

Remote control panels

Some watermakers have the option of a control panel which allows for easier access and remote control. Control panels tend to have a fairly simple interface with just a few gauges but may include a salinity sensor—so you can keep tabs on water quality—and auto-flush integration—so you can flush your watermaker with the flip of a switch.

Top watermaker brands

If you’re considering buying a watermaker for a boat, here are some of the top brands to consider.

• Cruise RO Watermaker
• Echotec watermakers
• Horizon Reverse Osmosis (HRO)
• Sea Recovery watermakers
• Schenker watermakers
• Spectra watermakers

Fiona McGlynn is an award-winning boating writer who created Waterborne as a place to learn about living aboard and traveling the world by sailboat. She has written for boating magazines including BoatUS, SAIL, Cruising World, and Good Old Boat. She’s also a contributing editor at Good Old Boat and BoatUS Magazine. In 2017, Fiona and her husband completed a 3-year, 13,000-mile voyage from Vancouver to Mexico to Australia on their 35-foot sailboat.

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Yachting Monthly

• Digital edition

Everything you need to know about watermakers

• February 24, 2023

An onboard watermaker will free you from ever worrying again about where your next freshwater stop will be. Andy Pag looks at the latest models available for your yacht

The feeling of autonomy that a watermaker gives a yacht is unique. It transforms that weekend-only cruiser into a go-anywhere, life-on-the-hook, adventure craft, breaking the tether to marinas.

Filling your water tanks at the fuel jetty will always be a cheaper alternative to the eye-watering cost of buying and installing a watermaker, but there will be times when your plans are limited by having no access to a tap or if the only source available doesn’t look particularly appetising. And in the event of a burst pipe or accidentally draining your tank mid-passage, it means you’ll be able to keep sailing at the flick of a switch, rather than having to reroute to refill.

Watermaker desalination process

Watermakers – technically known as desalination units – use a process called reverse osmosis (RO) to make drinking water. By forcing salty water at a high pressure against one side of an RO membrane, fresh water will slowly seep through, leaving the salt and bacteria behind. The output is notably devoid of minerals, but the taste can be a little strange at first. Think of the membrane as a filter so fine that even bacteria and salt molecules can’t get through it.

But as well as the pressure, a membrane also needs to have the water flowing over it to flush away all the stuff that didn’t pass through as it would otherwise block the membrane’s pores. In this way it’s different to a filter because a membrane has a salty inlet, a freshwater output, and a saltier discharge outlet.

Much of the cooking done onboard needs fresh water. Photo: Tor Johnson

High pressure pumps

Creating high-pressure water, which is also flowing at speed, takes a lot of energy, and there are two methods watermakers use to achieve this. One is simple: a high-pressure pump. This can draw a lot of current but it creates the speed of flow needed, and the forceful pressure too. The saltwater is directed to the membranes and the pressure is created by closing down a tap, called a needle valve, at the discharge to build up pressure on the membrane while still allowing water to flow out through the needle valve at the required speed.

High-pressure pump watermakers are fast, but they aren’t the most energy- efficient way of creating clean water. They are usually tuned to produce 60 litres per hour or more but can draw upwards of 500W and while there are 12V versions, they typically use mains voltage pumps and are better suited to being run from a generator than a battery bank.

They’re designed to fill your tanks quickly so you don’t have to run the generator for long. Mechanically, they’re simple, and apart from the high-pressure pump there are no moving parts to go wrong.

A watermaker and its many parts.

Energy recovery

The alternative method is a Clark pump watermaker, also known as an energy recovery device (ERD). This uses a fast-running but much lower-pressure pump which needs less power. To obtain the high pressure required, the pressure in the discharge water is harnessed by a couple of reciprocating pistons and used to boost the inlet pressure. It takes a few minutes to build up pressure and during that time the output is slow and not very clean.

Watermaker running costs

An ERD unit will typically produce 20-60 litres per hour. The lower demand on the pump means it can be reasonably powered by 12V with as little as 9A, and can produce a litre of water with just 4-5Wh of energy. High-pressure units need between two and three times that energy per litre. If you run your boat from solar panels or don’t have a generator, this is the type of watermaker to go for.

Devoid of minerals, the taste can be a little strange at first

In fact, your boat’s power source is the first thing to look at when considering which type of watermaker to get. But it’s also worth remembering that the extra complexity of ERD units make them expensive to buy and more prone to breakdowns.

When choosing an ERD watermaker it’s therefore really important to consider the availability and costs of spare parts because sooner or later they will need servicing.

Most manufacturers have a dealer network that can provide advice, but don’t count on them stocking parts or offering servicing. These machines are notoriously fiddly to repair, and one dealer told me discreetly it’s not financially viable for him to offer a repair service as the time it takes can spiral into hours. That leaves you with the option to send the machine back to the manufacturer at great expense, or do it yourself.

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After-sales service

Spectra has one of the best reputations for after-sales service. In most places you’re more likely to find Spectra and Schenker dealers, but that doesn’t guarantee they’ll have parts in stock, and all manufacturers will ship parts to you. Spectra also offers rebuild kits which come with step-by-step instructions and special tools to get to those hard-to-reach O-rings. They feel like a lot of money for a bag of O-rings, but are a cheaper option than sending the unit back to the factory.

If you’re buying new, a warranty is highly valuable but once it runs out you’ll find out how pricey the parts really are. Some manufacturers give longer warranties if a certified technician installs the system.

Most ERD units are made out of engineering plastics such as Delrin which can split around fittings if over-tightened or if warm water is used during cleaning.

One leading UK dealer who sells all brands told me that since Spectra changed the type of plastic used a few years ago he’s had no returns, unlike rival brands. Spectra were tight-lipped on the material they use when Yachting Monthly asked them for details.

An average-sized watermaker will easily squeeze into the space under a bunk

Watermaker instillation tips

A bad installation can render a good machine useless, so there are a few key points to know. Use dedicated through-hulls for the saltwater intake and brine discharge. Make sure the intake is low enough that it won’t be exposed when heeling or in big waves to prevent air bubbles entering the system. Don’t install the intake where there will be turbulent flow, behind the keel, for example, or near the props and rudders. The discharge should be above the waterline.

To give the pump the best chance of producing the pressure needed, install it as low as possible in the boat. Follow the manufacturer’s recommendations on hose diameters and avoid long hose runs and tight turns that restrict flow.

Finally, use correctly sized wiring as the 12V pumps will underperform if there are voltage losses in the wiring.

Monitoring quality

A Total Dissolved Solids (TDS) meter measuring impurities in the output water coupled to a diverter valve can automatically protect the purity of your tank. Anything under 500ppm is fine to drink but a well-installed system should deliver 200-300ppm.

You can buy inline TDS meters, or stick meters that you dunk into a sample cup to monitor it manually. You’ll see it slipping over time if there’s a problem developing with the pump or membrane.

It’s important to flush or ‘pickle’ your watermaker if you decide to not use it for any period of time

Membrane care

The membranes will produce more output and cleaner output in warmer and less salty seas. For the best lifespan, use them every few days. Drying them out, or running chlorinated water through them will do irreparable damage.

According to Dupont, which makes the widely used Filmtec membranes, they should not be left unused for more than 24 hours, but in practice they can be left for around five days before organic growth risks building up on the membrane, which blocks it and reduces performance. This can sometimes be remedied with an alkaline flush if caught early.

The other thing that can block them is carbonate deposits. In this case, an acid flush will restore some of the membrane’s performance.

If idle for a few days, it’s worth flushing the membrane with fresh water. Some manufacturers recommend doing this after every use, but that’s to protect other components in their systems.

If the machine is going to go unused during the off-season, the membrane can be pickled in propylene glycol. Most manufacturers offer branded pickling solutions and restorative solutions which conform to their warranty and don’t react with other materials in the system.

Avoid using the watermaker in anchorages where other boats aren’t using holding tanks. Although the membrane will sift out e.coli, the pre-filters will become a nasty Petri dish of bacteria.

Pickling tablets will be less aggressive on internal metal components

Don’t leave me this way

Different manufacturers have different recommendations, but, as a general guide, here’s what to do if leaving your watermaker unused for any period of time.

1-5 days: In practice, leaving the membrane sitting in saltwater won’t do too much harm, even though the membrane manufacturer warns against more than 24 hours. Check your watermaker manufacturer’s recommendation though. For instance, Spectras suffer from dramatic internal electrolysis if left soaking in sea water.

1-2 weeks: Definitely flush it through with fresh unchlorinated water. Use a carbon filter to remove chlorine if you are flushing with tap water.

More than a month: Pickle it.

They used to recommend using acid (hence the term pickling) but now manufacturers recommend propylene glycol, which is less aggressive on O-rings and other metal components. Buying the branded solution for your machine will give you peace of mind.

If your boat lives in relatively clean water, think about setting a timer so the machine runs automatically every few days for 10-15 minutes. That’s long enough to flush the membrane and prevent organic build-up.

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Do You Need a Watermaker for Your Sailboat?

• By Jen Brett
• Updated: October 2, 2019

I remember, in the not too distant past, when having a watermaker aboard a cruising boat seemed to be the ultimate luxury. Plenty of sailors considered them too expensive and complicated. Fortunately times have changed. With improved technology and a range of price points on the market, now even average cruising boats of modest means carry a reverse-osmosis system. And really, is there anything that feels better after a day spent sailing and swimming than a hot shower? The freedom and security that come with full water tanks are also a nice bonus, particularly if you’re cruising in an area where fresh water is difficult to come by and pricey when you do.

Choosing a Watermaker

As with any major system, there are many factors to consider when you choose a watermaker. You’ll need to figure out your freshwater needs, the space you have available for the system and how you’re going to power it . Generally speaking, in a reverse-osmosis desalination system the raw water is run through a series of pre-filters, and then a high-pressure pump moves the water through one or more membrane housings. The wastewater, or brine, is released overboard and the product water goes into your water tanks.

Since all of the watermakers that are currently available for cruising sailboats use this process for desalination, the major differences between the systems are how you power the high-pressure pump and the user interface. Powering options include 120/220-volt AC, 12- or 24-volt DC and engine/belt driven. All have their pros and cons.

“The first question I ask a potential customer is ‘Will your boat have a ship’s generator?’” said Rich Boren of Cruise RO Water. “If they plan to have a generator, then the decision to go with a 120-volt high-output watermaker seems natural. While running the generator for battery charging and other loads two to three times per week, they can keep their water tanks full without having to make generator runs just to make water.”

A 12-volt system, such as the Spectra Catalina 300 Mk II or the Horizon Reverse Osmosis Seafari Quest, makes a lot of sense for smaller cruising boats since they don’t need a generator to run and have fairly miserly power consumption. On a breezy, sunny day, a solar panel and/or a wind generator will likely keep up with the demand. “The only difference between 12-volt DC low-output and 120-volt AC high-output watermakers is how the high-pressure pump brings seawater up to the 800 psi needed to drive fresh water through the reverse-osmosis membrane,” Boren said. “The membrane and support equipment, like pre-filtering and plumbing, are the same.”

These systems typically produce anywhere from about 6 to 16 gallons per hour, and some units can do so for about a 1-amp-per-gallon power draw.

“Many smaller sailboats, under 45 feet or so, often utilize solar panels,” said Berkeley Andrews of Parker Hannifin, which produces Sea Recovery, Horizon Reverse Osmosis and Village Marine watermaker systems. “Their entire electrical backbone consists of 12-volt or 24-volt. So they must have a watermaker that can operate on low voltage. These customers have limited amp hours on their batteries, so all of their equipment must be suited to handling this.”

In choosing a watermaker, Bill Edinger, owner of Spectra Watermakers, said to be realistic about water needs. “When helping customers decide which system is right for them, first we like to determine their approximate water usage with questions like ‘How many people are aboard normally? Are you going to be living on the boat full time? Do you have a washing machine? Any children? Are you going to be cruising full time or leaving the boat for extended periods?”

A common error people make is choosing a watermaker that is too small for their needs. “The most common mistake I see cruisers making in their watermaker purchase decision is underestimating how much water it will take them to cruise comfortably,” Boren says. “I’m not talking about the minimal amount of water it takes for the crew to stay alive, because there is a big difference between staying alive and comfort. Selecting a watermaker that will only meet their minimal drinking-water needs but not keep up with the comfort needs of the crew can lead to crew tensions and feeling like camping rather than cruising.”

Remember that “watermakers are rated in gallons of production in a 24-hour period,” Edinger said. “So a 300-gallon-per-day watermaker system sounds like a lot of water. The important thing is that it produces about 12 gallons per hour. Normally a system like this will be run three to four hours per day if power is not a critical issue, in this case producing 36 to 48 gallons of water. It’s better for a system to run for a few hours every few days than an hour every day.”

Watermakers for Small Boats

If space is at a premium, consider purchasing a modular system instead of an enclosed one. In a modular system, the components, such as the membranes and filters, can be mounted separately. Another power source for the high-pressure pump is the boat’s diesel engine. In these engine-driven setups , the pump and an additional pulley are mounted on a custom bracket next to the engine. The watermaker can then be run while motoring or using the engine to charge the batteries.

While engine-driven watermakers can produce a large amount of water, 20 or more gallons an hour on average, the downside is that the installation can be more complex than for other systems. “Unlike the 12-volt DC or 120-volt AC watermakers, where you simply bolt the high-pressure pump down and then run the wires and plumbing hoses, the hardest installation aspect of an engine-driven watermaker is finding space. Some boats simply have no room in the engine compartment to mount the 5-pound pump with a 7-inch pulley on the engine while still leaving access to other engine parts that need to remain serviceable,” Boren says.

A relative newcomer to the marine market, the portable watermaker is a good solution for cruisers who want the convenience of a watermaker but don’t want to permanently install one. The Rainman is one such system that is available as a self-contained unit driven by a gasoline-powered Honda motor, or as a 115-volt AC-powered unit. “The bulk of our gasoline-powered system customers are sailing yachts between 30 and 50 feet,” said Ron Schroeder of Rainman Desalination. “Our customers seem to prefer to have a simple and somewhat manual system over one that relies on control panels, software and solenoid valves. We are also attractive to those customers who have had bad experiences with the installation process of an installed system.”

The Spectra Passport is another portable system. Edinger said it has already proved popular with offshore race crews and cruisers who need a watermaker for only a limited time.

Maintenance for Watermakers

Watermakers have long had a reputation for being difficult to maintain, but the equipment has improved over the years and overall, routine maintenance isn’t more challenging than with other onboard systems. “The best rule of thumb is to operate the watermaker in water that looks good,” Andrews said. “There are a few factors in the feed-water condition that come into play. Operating a watermaker in dirty harbors will most certainly result in repeated pre-filter changes and a clogged sea strainer. If you have extra filters on board, you can get by, but it’s not recommended. The environment in the open ocean and remote anchorages is much better. Also consider how shallow the water is where you’re anchored. Sometimes there can be a lot of tidal movement, which can kick up fine particulate and sediment. This too can also contribute to more frequent filter changes and even damage other components. A nice option is an automatic freshwater flush, which will rinse the watermaker’s membrane element after use. It helps keep the membrane vessel housing free of any biological growth that could foul the membrane and reduce your ability to produce fresh water.”

Whatever system you choose, with proper use and maintenance you can expect years of service from your watermaker. And plenty of hot showers.

Jen Brett is a CW associate editor. This article first appeared in the February 2015 issue of Cruising World.

Aqua Marine: www.aquamarineinc.net

Blue Water Desalination: www.bluewa​terdesalination.com

Cruise RO: www.cruiserowaterandpower.com

Dometic Marine Sea Xchange: www.do​metic.com

ECHOTec: www.echotecwatermakers.com

FCI Watermakers: www.filtrationconcepts.com

Horizon Reverse Osmosis (HRO): www.hrosystems.com

Katadyn: www.katadyn.com

Rainman: www.rainmandesal.com

Sea Recovery: www.searecovery.com

Schenker Watermakers: www.schenkerwa​termakers.com

SK Watermakers: www.skwatermakers.net

Spectra Watermakers: www.spectrawater​makers.com

Village Marine Tec: www.villagemarine.com

Watermakers Inc.: www.watermakers.com

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Yacht Watermakers

Building your own watermaker

Modern technology has brought us many new devices that make the cruising life much safer and easier. Since we are not interested in camping out while cruising, obtaining safe and clean fresh water has always been a major priority, especially overseas. The three most common ways of obtaining fresh water on a cruising boat are: 1) an effective rain collection system, 2) from shore via a hose, or 3) a watermaker. Given reasonable storage capacity and a good filtration system, a high-capacity watermaker is the most efficient — especially if you are a boonies cruiser.

A reverse-osmosis watermaker takes clean seawater and, by pushing it through a specialized membrane (special filter) at relatively high pressure, makes fresh water. This means that no longer do we have to carry hundreds of pounds of extra fresh water just to ensure we don’t run out. Also, we no longer must get up in the middle of the night to catch rainwater, or search out places ashore where we can jerry-jug water from sometimes expensive or suspect sources.

Watermakers suitable for use on a cruising boat can be obtained from a number of sources depending on your budget and tolerance for electronics gadgetry. But they all do the same thing: make fresh water from seawater. We think that if you are going to have a watermaker aboard, it should have bulletproof — and mainly mechanical — equipment with minimal electrical and electronic parts; use commonly available (not proprietary) components; make the most water practical in the shortest time (40 gallons per hour is our choice); and be repairable with onboard spares, tools and skills.

As an example, we use about 50 gallons of fresh water a week for daily cooking, drinking, showering and cleaning. A 40-gph watermaker with two 40-inch membranes can make that in one and a half hours with setup and flushing time included. Smaller units can take significantly more time to do the same work, thereby seriously affecting a cruiser’s free time. 

An engine-driven pump Because the power needed to run this volume through the membranes is more than 2 hp and a 12V motor won’t handle that, we have chosen to belt our watermaker pump to our main engine on our last two boats. This is similar to an alternator arrangement. You can drive a watermaker pump with a generator, but using only a generator puts another expensive, sometimes cantankerous and complicated piece of mechanical/electrical equipment between you and fresh water. If the generator fails, as they sometimes do, you are back to spending hours per week manually collecting fresh water from rain or shore.

We most often run the watermaker when underway and moving the boat. Infrequently, we run it at anchor and sometimes just flush it with fresh water to satisfy the once-a-week run requirement that prevents biologic buildup on the membranes.

We average less than 10 hours per year in the tropics using the engine just to operate the watermaker.

If you decide to make your own watermaker, there are several sources of information on the Internet, including my guide. Fifteen years ago, it took me quite a bit of time to engineer the specifications, develop a parts list, and then find and purchase the equipment. By that time, I had seen two successful DIY units, so I knew it could be done. I used a mix of some used and some new parts, mainly because I was on a tight budget. Since then, I have refined the unit somewhat, installed two units on our boats and helped several other cruisers do their own using my information.

Extensive engineering details are on our website under “CSY Workshop,” and we have a PowerPoint slideshow in our “Presentations” section. There is also a Seven Seas University webinar I did for SSCA a couple of years ago, with the slideshow narrated. 

Better than the WHO standard My first unit on Soggy Paws , our CSY, was still in service after eight years when we sold the boat in 2016. It had the original pumps, membranes and fittings, and was belted to our 60-hp Perkins. It was still producing fresh water that tested to about 250 ppm (parts per million solids content). The World Health Organization standard is 500 ppm.

Because I was careful never to run my watermaker in dirty or silty locations, in addition to having two pre-filters, I never had to clean the membranes in eight years.

The second installation on our catamaran is now belted to a 27-hp Yanmar 3GM30. It has a different mounting configuration, and after four years of use still produces water at less than 200 ppm.   There are many ways to mount a pump to an engine; you just need to be able to tightly tension the belt drive around the crankshaft pulley. You want to use an appropriately sized pulley to run the watermaker at near full rpm from an engine running around 50 percent of its maximum rpm.

Once you have all the parts, any competent cruiser should be able to install a watermaker in a week. It took me two weeks — but then I never claimed to be competent, just thorough.

As with ground tackle, we think bigger is better, within reason. So if you don’t have a watermaker yet, consider easing your cruising workload and making the crew happy by obtaining a watermaker. Then you can wash dishes in fresh water, take freshwater showers every day, and not worry about using too much water — just like normal people.

Dave McCampbell is a retired U.S. Naval diving and salvage officer with over 40 years’ cruising and eight sailboats’ worth of maintenance experience. He and wife Sherry, currently cruising in Southeast Asia, spent eight years crossing the Pacific via Easter Island, Hawaii and Micronesia. Prior to that, they circumnavigated the Caribbean over four years. Their most recent excursion was a 7,000-nm journey from the Philippines to the lower Solomons via eastern Indonesia and Papua New Guinea. Four years ago they sold Soggy Paws , their CSY 44 monohull of 19 years, and moved to the “enlightened side,” purchasing a new Soggy Paws , a St. Francis 44 catamaran. Their extensive website is at SVSoggypaws.com .

By Ocean Navigator

An introduction to watermakers for yachts

With thanks to VDM - Reya ,  Astilleros de Mallorca  and Sea Recovery

While water management systems are vital to the smooth and cost-effective running of superyachts, they must operate seamlessly, effectively and without hassle. With a huge demand for fresh water for showers, baths, food preparation, laundry, washing down, etc. superyachts need to be able to produce their own fresh water through desalination.

Find suppliers of yacht watermakers in your area here

Having a yacht watermaker (also known as reverse osmosis desalination systems) on board is a huge advantage because of the reduced need to have large, heavy water tanks on board for long charters. Depending on the design, superyacht watermakers can be powered by electricity from the battery bank, an engine, or an AC generator. 

The importance of a yacht watermaker

Astilleros de Mallorca  commented, "First and foremost safety should be a paramount concern. When you consider the average superyacht passenger can consume anywhere from 30 gallons of water to 100 gallons of water per day, having a fully functional and quality watermaker on board, greatly limits the potential risk to crew and passengers by providing virtually limitless fresh water. This becomes even more essential in the event of an emergency that keeps a superyacht offshore for an extended period of time. This provides both crew and passengers with peace of mind."

Having the ability to make fresh water while you are underway frees the superyacht from the burden of carrying the water weight necessary to accommodate an entire voyage. Consider this, water weighs approximately 10 pounds per UK gallon (8.3 per US gallon) this extra weight adds up and can reduce the distance you can travel over a given period of time. It is also worth considering that if the superyacht is power driven, fuel costs will increase according to the additional weight carried on the journey.

How much water do you need?

There are plenty of watermakers on the market, but what sort of capacity is best for you? Experts say around 25 to 50 gallons of water per person per day is enough, you’re not going to drink that much water, certainly, or use nearly that much for showers and cooking, but an awful lot of water is used to wash down boats.

Of course, whatever the watermaker is used for, you’ve still got to figure out how often, and how long, you want to operate it. If you use, 30 gallons per day and you want to desalinate for three hours every day, you’ll need a 10 gallon-per-hour watermaker, or 240 gallons per day, to keep the tanks topped up. But a 400-gallons-per-day model, making 16 gallons per hour, will let you desalinate every other day for just less than four hours. It’s a balancing act.

Yacht watermaker misconceptions

When considering a watermaker for a smaller vessel, a complete picture is needed. There are some common myths which need to be dispelled before a fair decision on purchasing one can be made.

Myth 1: Watermakers are an expensive piece of equipment

It's true that a yacht watermaker may not be an essential piece of kit on a smaller vessel, but it is still an investment that must be thought about. (A very basic water model today costs somewhere upwards of £1500 for a yacht up to 20m and yachts over 30m start at around £14,000)

The cost of a watermaker is just as relative as GPS, radar, fenders, interior design, etc…, and just like this other equipment it offers convenience, flexibility and peace of mind.

Myth 2: Maintaining a watermaker is difficult and costly

A watermaker  needs little maintenance and is much less of a drain on time and money then first considered.

watermaker membranes are probably the most expensive part to purchase, but just like everything else if looked after from the beginning and routinely flushed and then pickled, so the need to replace the membrane will become less frequent. Prevention is the key with watermakers, if you maintain them properly, they require little investment.

See a guide on watermaker maintenance here

Myth 3: Pickling a watermaker is complicated

Pickling is the process of preparing a watermaker for storage if it will not be used for a period of time. There seems to be an overwhelming misconception in the boating industry that this is a complicated process.

Firstly, it is not. Simply put, pickling is storing a watermaker. The only difference is that flushing the system with a solution is needed to prevent the growth of bacteria. That's it.

When the watermaker is needed again, just discard the product water for the first 15 - 20 minutes to be sure the solution has been completely rinsed from the system.

Myth 4: A lot of power is needed

As mentioned previously powering a watermaker can be done using a variety of methods (electricity from the battery bank, an engine, or an AC generator.) Most watermakers are engine-driven, in which case battery power isn’t getting used. If a motor boat is owned, the engine will be used all the time. If a sailboat is owned, the engine will be used regularly to accommodate for no wind. If the engine is going to be run anyway, why not use the energy to fill water tanks?

Battery-powered watermakers do consume a lot of power and sacrifices may have to be made when deciding on what to use fresh water for. However, Fabienne Guerin from Reya SAS , experts in electricity production and conversion commented, "Batteries have developed over the years allowing new opportunities for superyachts, commercial boats and offshore vessels.  

Having exposed these myths around yacht watermakers, hopefully a fully informed decision can be made on whether or not one would suit your boat or superyacht.

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How to Install a Marine Water Maker on Your Yacht

In this article topRik's experts, based on their own experience, explain how to mount a marine water maker on board a yacht. You will be guided through all the installation steps, illustrating, if possible, the process of installation a reverse osmosis desalination system. After reading this article to the end, you will be able to evaluate your own technical skills and knowledge in order to solve an important dilemma: install the watermaker yourself, guided by the instructions, or invite a specialist to do this.

• INTRODUCTION
• PLANNING THE INSTALLATION
• PREPARATION FOR INSTALLATION
• INSTALLING THE PRE-FILTRATION SYSTEM
• INSTALLING THE REVERSE OSMOSIS SYSTEM
• CONNECTING THE SYSTEM COMPONENTS
• FLUSHING AND TESTING THE SYSTEM
• TROUBLESHOOTING AND ADJUSTMENTS

Introduction

Importance of proper installation for marine water makers can hardly be overestimated - the normal operation of the equipment and its service life without breakdowns depend on nailing this process. Like any piece of equipment that has more than two parts and connects to main circuit or battery power, the watermaker cannot be installed by just using muscles. Certain knowledge, skills and compliance with safety regulations are required.

Just think about it: electrical equipment with constantly circulating water inside! It can become very dangerous if inept actions are taken during installation and subsequent testing of the system. Add to it the fact that installation errors will affect during a long voyage, leaving the crew without fresh water.

This gives rise to a whole list of installation requirements and considerations, among which the most important is the experience of the person installing it, namely:

• knowledge of safety regulations when working with electrical appliances;
• ability to read wiring diagrams;
• skills in working with tools;
• the ability to choose the right place for the installation of equipment, taking into account all the features, including - for modular equipment;
• knowledge of the principle of operation of high and low pressure pumps;
• concepts about the process of cleaning by reverse osmosis using special membranes;
• experience with filters of various degrees of purification, etc.

If you feel confident in the above set of skills and practical experience, you can take a chance and install the watermaker yourself. And if you have experience like this, you probably know that you should read the installation instructions before you start pulling all these cool things out of the box. And not after these things in the collection suddenly refuse to work.

And even after you have carefully studied the instructions and imagine the purpose of each part, as well as the whole process as a whole, it is not yet time to start installation. Start planning!

Planning the Installation

The choice of installation site is important not only for ease of maintenance, although this is also an important factor. It is enough to look at the configuration of a compact (left) and modular (right) distiller to understand that they should be mounted according to different principles.

A standard (or stationary) distiller will take up more space than a modular distiller of the same capacity, since parts of the modular model can be moved apart. It is necessary to estimate the areas and volumes of different rooms of the yacht where the watermaker can be placed.

We warn you right away: if you have a cramped engine compartment, do not risk installing a desalinator there, since the temperature in the engine room can reach or exceed +40° C, and this is dangerous for reverse osmosis membranes.

You should choose a place where accidental water leakage is excluded and there is no access to fuel vapors.

Once a location for a desalination system has been found, an assessment of the yacht's power system should be made. You may have different power supplies for marine water makers. It is unlikely that you will use models that are started by a belt from the engine - this is the prerogative of heavy ships. For a yacht, the choice usually offers a 12 or 24 V DC desalination system from a battery or 120-220 V AC from a generator.

Preparation for Installation

Only after you have studied the instructions, decided on the place and choice of power source for the desalination system, you can prepare for installation.

The first step will be gathering tools and materials. List in order all stages of installation (in writing if possible) and determine what tools and materials may be needed at each stage of the process. Our experience shows that if you take up the installation without this stage, you will have to constantly be distracted from work looking for a key of the right size, a jigsaw, a piece of plywood or metal for hinged doors, etc.

You may need to lengthen the hoses, then you will have to purchase the desired length, as well as fittings. Just keep in mind that various tees and additional valves prevent the movement of water, as a result of which the pressure in the system can drop if you get too carried away with additional tie-ins.

If a desalination system was previously installed on the yacht, removing any existing water maker components must be ensured, so that new hardware is not mistakenly connected to elements of the old system. But the existing holes can be used so as not to drill additional ones in the yacht.

And only after that you can proceed directly to the installation of marine water maker .

Installing the Pre-Filtration System

Pre-filtration does not allow larger contaminants to enter the desalination system than molecules of salts, pure water and microorganisms. Pre-filtration system consists of a coarse filter and a filter that retains fragments down to 5 microns. The pretreated water is then fed to the membranes of the reverse osmosis system.

The seawater inlet shut-off valve must be below the waterline to prevent air from entering the system, which could cause the low pressure pump to cavitation. The location below the waterline applies to the pump itself, as well as to the coarse filter. And both of these parts should be as close as possible to each other, like in this diagram, where 1 is an inlet valve, 3 is a pre-filter, 4 is a low pressure pump , 6 is a 5-micron filter.

The pre-filter is best installed in an easily accessible location as it clogs quickly and needs to be cleaned regularly. If you mount the pre-filter housings just right, you will have no problem supplying water to the reverse osmosis system at the right pressure. Connecting the pre-filtration system to the yacht's water supply is made through 3-way valve.

Installing the Reverse Osmosis System

Reverse osmosis system of the marine desalinator consists of the reverse osmosis membrane and the high-pressure pump. Mounting the reverse osmosis membrane is required only in modular models - in stationary desalination plants reverse osmosis membrane is already installed out of the box.

If you have a modular model, you can separate parts of the watermaker for easy maintenance. topRik experts still recommend not to get carried away, since lengthening the hoses over 4-5 meters can lead to a decrease in pressure in the system and a decrease in its overall performance. The membrane in a suitable high pressure case (container) can be installed horizontally or vertically. In the latter version, the fresh water outlet should be at the top.

Installing the high-pressure pump is done with the help of a high-pressure pipe (hose), which connects the pump with the reverse osmosis membrane. The length of this hose must not exceed 1 meter.

Connecting the System Components

If we are talking about a modular watermaker, after mounting the preliminary filtration and reverse osmosis systems, you can go on with connecting them together. Using a high-pressure pipe, following parts are connected:

• high pressure pump outlet and 5 micron pre-filter inlet;
• prefilter outlet and high pressure pump inlet elbow;
• pump outlet with brine outlet.

The high-pressure pipe for the installation described above is pressure-resistant up to 20 bar and cannot be replaced with a random one.

After complete installation, we are connecting the device to the yacht's electrical system. Follow exactly the specifications of the connection cables specified in the instructions to prevent voltage drops and energy wastage.

Flushing and Testing the System

Testing of desalination equipment is best done on the high seas so as not to take excessively polluted water in a port or marina.

Before the first start-up, make sure that the 3-way intake valves are in the appropriate position so that the first purified water is discharged. Make sure the pumps are delivering water in the correct direction. Regularly check the pressure level on the manometer.

Then stop the feed pump and set the 3-way valve to the “flushing” position and start the pump again for a few minutes. Flushing the system with clean water is repeated until new membranes are free of preservative. The pressurized fresh water system must be turned on.

After that, the seawater desalination system is launched. Testing the system's performance and water quality is carried out using special measuring equipment: flow meter, low- and high-pressure gauges, TDS (salt meter).

Troubleshooting and Adjustments

topRik experts believe that the most common issues and their solutions marine water makers services are as follows:

• drying of membranes - occurs if you do not rinse the desalinator after each use, leave it inactive for more than 3 days. If washing with clean fresh water did not restore the performance of the equipment, then the membranes are overgrown with salts and microorganisms - they should be washed with a biocide, and if this did not help, then replace the membranes;
• low pressure gauge indicates excess pressure – it usually means that the cartridges of the primary filter and the 5-micron filter are clogged, they must be cleaned or replaced;
• the high-pressure gauge indicates an overpressure - the diaphragm is probably overgrown or damaged and needs to be replaced.

Correctly adjusting system settings to optimize performance can help eliminate these and other issues by checking your measurement equipment regularly. Each discrepancy between the parameters of the distiller (capacity, water quality, system pressure, etc.) is a sign that the equipment needs to be adjusted or repaired.

Final Checks and Inspections

To be confident in the uninterrupted work of the marine water maker, you better double-check all connections and components. All components and connections of the watermaker's hydraulic as well as electrical systems should be checked. At the same time, we recommend that you write down the results of the check-up in a table, marking the checked elements and nodes.

Ensuring compliance with safety regulations during the process of installing a watermaker lies with the owner of the yacht, or a trustee appointed by him, if the yacht is part of the charter company's fleet.

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Welcome to SeaWater Pro, the premier provider of high-quality watermakers for boats and portable watermakers for all your marine adventures. Our cutting-edge technology and reliable products will ensure that you have access to clean, purified seawater wherever you go. With our easy-to-use and reliable watermakers, you can say goodbye to bulky storage tanks or worry about running out of fresh water. Our compact and efficient systems are designed specifically for marine use, making them perfect for boats of all sizes. Whether you're cruising the open seas or anchored in a secluded cove, our watermakers will provide you with a steady supply of fresh, drinkable water. At SeaWater Pro, we understand the importance of safe and clean drinking water while at sea. That's why our portable watermakers are equipped with advanced filtration systems that remove harmful contaminants and bacteria. Look no further than SeaWater Pro for your next, most reliable boating adventure investment!

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• Marine Electronics

A Guide to Marine Watermakers for Your Boat

• By Marlin Staff
• Updated: March 4, 2015

The World’s Largest Watering Hole

Once considered an extravagant option aboard a sport-fishing boat, watermakers are pretty much standard equipment today, with many boats even utilizing two units. Having a steady supply of potable water to shower, cook, live aboard and wash the boat with at the end of the day is a huge benefit. Converting salt water to fresh via the reverse-osmosis process gives you virtually mineral-free water, so it is far less damaging to topcoat finishes and Isinglass curtains than city or dock water. It’s also better for ice machines and the entire freshwater system.

Similar Operation

Boatbuilders who frequently install units have their favorite vendors for a host of reasons, and captains do as well, typically familiarity and service. The basic operation of any unit is very similar, so adapting to different manufacturers isn’t really a big deal as you move from boat to boat. Having the ability to get parts and reliable service should you have a breakdown wherever you fish or travel is always a top consideration.

The integration of automated switching and the ability to start and stop the water-making process without entering the engine room are major conveniences. One of the more recent trends has been the integration of wireless remote control of the units through the use of apps on smartphones and tablets. Not only will these tools start, stop and freshwater flush the units, but they can also be set to run for a specific time or maximum gallon production needed. They can conveniently monitor intake flow, product flow and total gallons, depending on the settings in the app. Several manufacturers also have the ability via a NMEA 2000 backbone to display and operate the units on shipboard monitors.

Blue Water Desalination is a relative newcomer to the marketplace with their Legend series of reverse-osmosis marine watermakers. The Legend series offers units with capacities from 475 to 1,850 gallons per day. Available in modular (shown) or container configuration, Blue Water units include a full-color 7-inch touch-screen display for simple operation. The large user interface with easily recognizable icons takes a lot of the worry out of operating the unit. Blue Water’s proprietary software continually monitors operation, helping to maximize production and quality. Featuring remote operation with NMEA 2000 or optional 3- or 7-inch color screens, the Legend series also features high-rejection membranes, freshwater flush and long-life Monel transducers, making it a full-strength competitor in the market.

The Aqua Whisper DX series from Sea Recovery has the NMEA 2000 remote-compatibility feature that allows monitoring of all functions on any NMEA-compatible display. These units also have a full-color digital touch-screen display that reads in metric or U.S. standard units for managing all critical functions. They also offer an optional remote screen that allows for the same control mounted on the bridge or in the salon. Made with special attention to noise reduction, the Aqua Whisper units feature a low-noise manifold system and a unique high-pressure plunger pump that has been designed specifically for reverse-osmosis applications. Sea Recovery also offers an optional upgraded pump that is water lubricated, eliminating oil and oil changes, and it can operate up to 8,000 hours between maintenance requirements.

Watermakers, Inc. has been ­supplying ­reverse-osmosis units to boats and ­remote locations for many years, and their ­WMS-1000 is a workhorse unit that can be set up in a container or ­modular configuration. It features a ­heavy-duty 316 ­stainless-steel ­direct-drive ­high-pressure pump and plumbing, high- and low-­pressure ­shut-offs, multitank control, an LED salinity monitor and auto diverter, as well as freshwater rinse and clean for maintaining membranes. Optional upgrade features include automatic start/stop with a manual override, and unattended rinse and remote operation via separate control panels. The WMS series is widely accepted and commonly found on today’s finer custom boats, offering units with daily ­capacities of 550, 1,000, 1,400, 1,700 and 2,200 ­gallons per day.

Industry behemoth Dometic offers the XTC series of watermakers with comprehensive manual control as well as total automatic operation. The XTC series offers a unique and functional platform with the addition of Dometic’s Smart Touch Integrated Intelligence Control (STIIC) software that allows users to remotely access the watermaker from anywhere in the world via smartphone, tablet or computer. There is also a mechanical override in the event of a computerized failure of some sort. Available from 600 to 2,200 gallons per day, the XTC Series also features a built-in 7-inch color touch screen with easy-to-see color icons and graphics. With automatic freshwater flush, a 316 stainless-steel high-pressure pump, high-rejection membranes, 316 stainless-steel flow and pressure components and a totally fan-cooled motor with thermal protection, the XTC series offers everything needed for making fresh water aboard.

With the technological advances, computerized controlling, remote access and dramatically improved components, it is hard to argue against having a watermaker aboard. If you travel, cruise or fish daily, having a watermaker increases your travel range and makes living aboard far more comfortable. It certainly helps with boat maintenance by offering virtually mineral-free water to prolong topcoat life. With a good membrane-maintenance program and annual service, your watermaker will give you years of good operation. Having the ability to easily use and maintain these systems will no doubt make your decision to purchase and utilize the full benefits of having a watermaker aboard an easier one.

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7 Best Sailboat Watermakers For Liveaboards 2024

If you’re a liveaboard sailor looking for the best sailboat watermaker then you’ve come to the right place. In this blog post, we’ll take a look at some of the best watermakers on the market and show you how they can help make your sailing experience more enjoyable.

There’s nothing quite like the freedom of sailing on the open water. If you’re a liveaboard sailor, though, you know that keeping your boat stocked with fresh water can be a challenge. That’s where sailboat watermakers come in handy.

Not only do they produce fresh water for drinking and cooking, but they also help keep your boat clean by providing water for showers and dishes.

In this blog post, we’ll take a look at the best sailboat watermakers available on the market today. We’ll discuss the pros and cons of each model so that you can make an informed decision before purchasing one for your boat.

So, whether you’re looking for a compact unit that is easy to install or a high-performance model that can handle large volumes of water, we have something for you. Keep reading to learn more.

How do marine watermakers work?

What are the benefits of having a watermaker on your sailboat.

• How do I choose a sailboat watermaker?

How big a water maker do I need?

How much does a sailboat watermaker cost, how much power does a watermaker use, how much space does a marine watermaker take up, maintaining your sailboat watermaker, the best sailboat watermakers for liveaboards.

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Marine watermakers are devices that convert salt water into fresh water, making them an essential tool for sailors and boaters. But how do they work?

At the heart of every marine watermaker is a reverse osmosis membrane. This is a thin, semi-permeable film that allows water molecules to pass through, but blocks out larger molecules like salt.

To create freshwater, salt water is forced through the membrane under high pressure. This process is known as reverse osmosis, and it leaves the salt behind in the brine stream. The freshwater that comes out of the other side is then collected and stored in tanks.

Marine watermakers are powered by either electricity or a diesel engine, depending on the size of the unit. Some small portable units can even be powered by a car battery.

You will probably want a pretty decent battery bank and solar or wind setup to power your watermaker. By far the easiest solution is to get a reliable, drop in battery. We highly recommend BattleBorn’s lithium batteries which is what we use to power our watermaker.

⚡ Check out BattleBorn batteries here

If you’re thinking of outfitting your sailboat with a watermaker, you’re in for a treat. Adam and I put off buying one for two years, as we weren’t sure it would be worth the big investment. But after a year in the Cyclades where finding free town quays with water was near impossible, we decided to bite the bullet and commit.

It’s the one thing we wish we’d done sooner. A sailboat watermaker has literally changed our lives at sea and we couldn’t be without one now.

Not only will you have a reliable source of fresh water, but you’ll also be able to enjoy extended stays at sea. Here are just a few of the benefits we’ve found of having a watermaker on your sailboat:

Perhaps the most obvious benefit of having a marine watermaker is that you’ll never have to worry about running out of fresh water. Whether you’re sailing around the world or just spending a few weeks cruising the coast, a watermaker will give you the peace of mind that comes with knowing you have an unlimited supply of fresh water.

Obviously, fresh drinking water from the watermaker is great, but it also means we don’t worry about taking a shower or the huge amounts of washing up caused by certain meals or having people over for dinner!

In addition to providing an endless supply of fresh water, a watermaker can also help extend your cruising range. By making your own water, you won’t have to make as many stops to restock your tanks. This means you can stay out on the open water for longer periods of time and explore more distant ports. It also saves a lot of money on marinas and a lot of trips to beach showers!

Finally, having a watermaker onboard can be a real lifesaver in an emergency. If your boat is disabled and you’re stuck at sea, having a way to make fresh water can mean the difference between life and death.

How do I choose the best sailboat watermaker?

There are a few things to keep in mind when choosing a watermaker for your sailboat. There is no one size fits all when it comes to choosing the perfect watermaker for you, so take some time to read the pros and cons of each model before you commit!

If you’re just cruising around the local waterways, you can get away with a smaller unit and top up your tanks with water from the dockside. But if you’re planning on venturing out into the open ocean, you’ll need a larger unit that can produce more water.

You’ll want to take into consideration the amount of people you’re likely to have onboard. Adam and I find out Rainman naked 12V system keeps up with our needs just fine, but after taking on two more members of crew we quickly ran out of water and struggled to keep up with the new demand.

You should also track your water usage habits for a bit to see how much water you use on a daily basis. If you can’t live without daily long showers, or you need fresh water to wash down the boat regularly, or you have fresh water flushing toilets then you’ll obviously be using a lot more water than others.

The amount of water you use when you have a watermaker is likely to increase a little from your needs now, as you’ll be a little less careful with it. Factor this into your decision!

Like everything in sailing, you can spend as much or as little as you want on a watermaker. There are even some people who have successfully made their own watermaker and only spent money on the parts (some of which you can source second-hand).

If you aren’t a wizard with things like that though, you’re going to be looking at spending a decent amount of money on a sailboat watermaker. On average, they cost around £3000-£5000 for a watermaker for a cruising sailboat (around 40ft).

You can spend more like £10,000 on a watermaker for a larger boat, and you can spend less on a second-hand marine watermaker or a DIY one.

We’ve put together a guide to help you work out your needs based on what you use aboard.

Different brands of watermakers are more efficient than others, but from our own experience and that of others we’ve talked to, it takes around 10 Watt-hours to make a litre of water – i.e. about 0.8 Amp-hours from a 12-volt battery.

Things like the chemistry of your battery bank, the length of your cable runs, and even the temperature of the sea, can all make a difference to the amount of power you’ll need to make a certain amount of water, but this is a rough average.

We’ve got a guide on working out how much power you’ll need.

A marine watermaker is a very useful tool, but it’s not exactly small. In fact, depending on the model, a watermaker can take up quite a bit of space.

The average unit is about the size of a small freezer, and some models are even larger. Given that most boats are fairly limited in terms of space, this can be a bit of a problem.

The good news is that there are now several manufacturers who offer compact watermakers that are designed to take up less space. These units are often smaller than a standard coffee maker, making them much easier to find a spot for on your boat.

We’ve included some great options for smaller boats below.

Like any piece of equipment, a watermaker requires regular maintenance. Fortunately, there are some simple steps that you can take to keep your watermaker in good working condition.

First, be sure to check the filters on a regular basis. Not only will this help to ensure that your water is clean, but it will also help to prolong the life of your watermaker.

Second, be sure to check the seals and o-rings for leaks. These are essential for keeping your watermaker operating efficiently, and any leaks can lead to costly repairs.

Finally, be sure to perform a yearly “spring cleaning” by flushing the system with fresh water.

By following these simple tips, you can keep your watermaker in good working order for years to come.

You should also account for the fact that parts are bound to break and need fixing or replacing. Most watermakers come with proprietary parts which make them a pain to fix in remote places, but there are a few that take non-proprietary parts. We would recommend these to anyone planning a larger cruising ground.

#1 Rainman naked 12V Marine Watermaker

The Rainman naked 12V watermaker is a great option for anyone looking for a compact, efficient way to produce fresh water.

The unit is simple to set up and use, and it produces up to 30 litres of fresh water per hour for a smaller unit, or up to 140 litres per hour for a larger one.

One of the main reasons we were drawn to Rainman watermakers is that they use all off-the-shelf, standardised parts. If your Rainman breaks down, it almost doesn’t matter where in the world you are – you’ll likely be able to get standardised spares in the nearest major city. For any liveaboards hoping to circumnavigate this should be an important consideration.

Installation was really very straightforward. End-to-end it took two days to install and test the unit, plus an extra day to get the autoflush set up.

We were pleasantly surprised to find that the unit came with almost everything we needed to install it. We were expecting to supply our own hoses, sundries, etc. but Rainman supplies everything you need.

Whether you’re sailing around the world or just weekends on the lake, the Rainman naked 12V watermaker is a great way to ensure you have access to fresh, clean water.

Check out our full Rainman watermaker review for everything you need to know.

#2 Spectra Newport 400c Watermakers for Sailboats

Spectra watermakers have an excellent reputation among the sailing community and you can’t go wrong with one of their marine watermakers for your sailboat.

They make a range of different sailboat watermakers to suit different needs and sizes of boat, from hand-operated desalinators that can make 6 gallons a day to their largest system that produces 20,000 gallons of fresh drinking water per day.

The Newport 400c model operates on as little as 4 watts per liter, so you can run it on a small generator, solar, wind, or even just straight off the batteries. It’s a great option

The Spectra Connect system means you can operate and monitor your watermaker from a remote device, and it has lots of other clever features including a fill tank mode and suggested maintenance intervals.

You can choose the speed operation on this sailboat watermaker for maximum flow or maximum efficiency depending on your power management onboard. This is a great ‘all bells and whistles’ watermaker that takes the guesswork out.

#3 Spectra watermaker Ventura Series

As with the Newport 400c, Spectra ensure these watermakers are built to last and they have a really great reputation.

The Spectra watermaker Ventura series is designed to be energy-efficient and lightweight and is the perfect watermaker for smaller spaces.

It produces 24 litres an hour, which is less than the Rainman model but still enough for a couple living aboard a small sailboat if you’re conservative with water usage.

You can also opt for a warm water model that will produce slightly more water per hour and is the same size (but you’ll need to be sure your cruising area is only warm water!)

#4 The Ultra Whisper

The Ultra Whisper by Sea Recovery is one of the best watermakers out there for smaller boats, or boats not set up with adequate power to run one of the larger units.

It can run on either AC or DC and claims a 75% reduction in power consumption compared to the other products listed here. It’s also super quiet, which if you’ve run a watermaker before, is actually a huge bonus!

This is a small but perfectly formed piece of equipment that will enable you to make water with the smallest power setup, but obviously, on the downside, you won’t produce as much water so you’ll need to be careful with your consumption onboard.

Sea Recovery has more watermaker models on offer in a wide variety of size and capacity options. There’s even a really tiny version that measures only 2-3 cubic feet for sailboats that can’t compromise on space.

#5 Village Marine – Little Wonder series

Village Marine is another of the most popular marine watermaker brands and has a reputation for making reliable and efficient sailboat watermakers in a range of different models to suit different needs.

The Little Wonder series is one of the smallest (the reason for the name) and weighs only 69 pounds with the ability to produce 180 gallons of freshwater per day.

It has a low RPM high-pressure pump in a modular design, which means you can install it in different parts of the boat to maximise your space. This is really handy for smaller sailboats.

Installation is quick and easy, and a competent DIYer can do it. It is anti-corrosive and as a bonus, is also quiet to run!

This is one of the best watermakers on the market for smaller sailboats, and should last a long, long time.

#6 Village Marine – LW Watermaker Series for bigger boats

For anyone out there looking for a serious sailboat watermaker for a bigger boat, Village Marine has something suitable. The LW watermaker series caters to boats up to 100 feet in length.

This watermaker can produce up to 1800 gallons of freshwater a day, which is a crazy amount and will give you complete water independence on board.

It’s a much larger unit, obviously, so you’ll need to make sure you have space on board. It’s also a lot more expensive so it really is only suitable for larger boats and commercial vessels.

#7 Rainman Portable Sailboat Watermaker

Rainman make a portable watermaker that has many benefits over an installed version. it won’t suit all sailboats but it’s a great option to have for the following reasons.

• You don’t need to install the system. You can cut out a lot of the faff and make fresh drinking water within minutes of receiving the product.
• You don’t need any extra holes in your hull to use the watermaker.
• If you race your sailboat you can store the watermaker ashore to save on weight.
• It’s a great option for smaller sailboats as it can be moved to accommodate for extra guests.
• You can take it with you from boat to boat.
• You can share the watermaker and potentially the cost!
• You can use it for all your trips away from water supplies. Take it on road trips, fishing trips etc.

A portable sailboat watermaker might make a lot more sense for your needs, and it’s great to have the option to choose between the two. This watermaker comes with all the benefits of the Rainman installed version, so you can check out our Rainman review to help with your decision.

Conclusion for the best sailboat watermakers

If you’re in the market for a watermaker, we hope our review has helped you narrow down your choices. We believe that the best sailboat watermakers are those that are reliable, powerful enough for your needs, and easy to maintain. So if you’re looking for an efficient and durable watermaker, be sure to check out the options on this list.

If you’re looking for more liveaboard tips or want help with planning your move onto a boat then check out our ‘ How to run away to sea ‘ guidebook for everything you could possibly need to know about living on the ocean.

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• Search Search Hi! We’re Emily, Adam and Tiny Cat, liveaboard sailors travelling the world on our 38ft sailboat and writing about it as we go. We hope we can inspire you to live the life you’ve always dreamed, whether that’s exploring the world or living a more simple way of life in a tiny home. Find out more. Patreon
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Our Systems

Echo tec. watermakers desalinators for boats, homes, and hotels.

ECHOTec  manufactures the most rugged and easy-to-operate desalinators/watermakers or desalination systems for yachts, commercial vessels, offshore installations, and land-based applications such as small communities, hotels, and beach houses. Designed for customer installation and ultra-reliable performance, far from factory-trained service centers, the wide product range covers modular AC, DC, and belt-driven watermakers from 8.4 GPH / 32 LPH to self-contained desalination systems with a production of 14.000 gallons or 53.000 liters per day.

More than 5,000   ECHOTec  desalination systems operate dependably and cost-effective throughout the world, many of them on continuous duty. Only the highest quality components, proven to withstand continuous operation in the harsh marine environment and comply with industry standards including NEMA, ASTM, API, NSF, and BSI are selected for safe operation and ultimate product life cycle. 

ECHOTec Watermakers are globally available directly from the manufacturer and through a fast-growing net  of factory-trained distributors.

Our Featured Desalinators

2400 GDP Series with Energy Recovery

115/230v AC Pro Series (Semi-Modular/Self-contained)

AC Powered Reverse Osmosis Watermaker

Testimonials.

After 8 years experience with our ECHOTec watermaker on “Lindisfarne”, we chose an ECHOTec 260-DML-1 for our next boat “Moon

Annika & Björn

We upgraded many systems on our 10.8m sloop Tryphena for our trip from the east coast to the Kimberley. The ECHOTec 260-DML-1 water maker was probably the best investment we made. It is a beautiful piece of engineering and lived up to our every expectation.

Peter Giller

I have had 3 watermakers on different yachts over the years and I know that I need a robust, simple and efficient machine. My Echotec 260-DML-1 is all those things. In recent voyages to the Louisiades, the Solomons, New Caledonia and Vanuatu, I have enjoyed reliable, easily made water. In the Solomons, where the sea water is very warm, I was getting a litre a minute from my 260-DML-1! I had a couple of queries when installing the unit and was greatly helped by Peter from Blue Sea Machines. I unreservedly recommend both his service and the product.

Lawrie Gubb

After one year in use, I can confirm that ECHOTec was the right choice for our Island Packet 380. The 12V-unit produces a vast amount of freshwater with minimal (service) effort. We particularly appreciate that we can get competent and fast support directly from the manufacturer – even a year after the purchase. We highly recommend this watermaker.

The Habibi Crew

Just to give you some feedback on our watermaker, I must say that I am really impressed with the unit. Having a fair amount of experience with RO units, although normally much larger than this one, I am surprised at the quietness of it. It runs much quieter than expected.

Your service in getting the unit to us before departure was great as was the way it was packaged and shipped. The unit is well put together and I am very pleased with the workmanship and the fact that you supplied everything needed to do the installation.

I am happy that I bought an Echotec watermaker and will be recommending it and your company to anyone who asks.

Matt Lansdown

This was our first attempt at changing our membrane since we installed the ECHOTec 260-DML-1 all by ourselves six years ago in Malaysia. Thank you for your prompt and helpful replies! We previously had a Xxxxxxx system that failed miserably in the middle of the Pacific, repair was complicated and expensive. We love the simplicity of the ECHOTec system. We had zero maintenance, except for the occasional gear oil and filter change, in the past six years! We just have installed new solar panels and are now able to run the watermaker on solar power only during high sun. It’s really great to be able to do this! Great product and outstanding service, thanks again! Kind regards

Denis & Maria

Since 3 years we have an ECHOTec installed like most cruisers we know. After more than 25.000 liters produced, we as well as all our friends have no problems with our desalination system. Therefore, we have decided to use an ECHOTec 260-DML-1 again on our new project: The 100% solar-powered catamaran “Solarwave”, without sails and any fossil fuel.

Michael Köhler 

Just wanted to let you know how pleased we are with our new watermaker and the service we have received from your company. Thanks to everybody for their help and patience and prompt service. We will certainly recommend you to others.

Jim and Paula

Having the Echotec 260-DML-1 on board and functioning superbly was of great assistance to our efforts during the Newport to Bermuda Race. Thanks for providing such exemplary service – which has impressed me along the lines of your pragmatic and efficient watermakers.