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Engine / Belt Driven Watermakers are ideally suited where the propulsion engine runs more than once a week. They produce 21 – 64 gallons of fresh water per hour, even on the smallest yacht without a generator. Every time the diesel engine runs, you will produce large quantities of fresh water and charge your batteries at the same time. Adding a watermaker pump to the alternator’s load will also benefit your diesel engine, as it does not like to run underloaded. 
The high-pressure pump mounts on a custom bracket directly to the main engine or generator. An electromagnetic clutch, driven via one A section belt couples the watermakers’ pump to the engine. The supplied U-bracket helps to install the pump on the engine like a second alternator.

Specifications and System Features
Model Rated Performance Membrane vessels
500 – BML – 1 22 gallons – 83 ltr./hour one 40″ vessel
900 – BML – 2 40 gallons – 150 ltr./hour two 40″ vessels
1200 – BML – 3 53 gallons – 200 ltr./hour three 40″ vessels
1500 – BML – 4 64 gallons – 242 ltr./hour four 40″ vessels

Reverse Osmosis performance varies with the feed water temperature and salinity.
The rated performance is tested at 26ºC / 80ºF water temperature and salinity of 35000 ppm TDS.
*Also available in 36 VDC, 48 VDC, 90-96 VDC, and 180 VDC
**Prices shown do not include shipping, taxes, and/or customs duties (if applicable)

Systems with 21″ membrane vessels
Operating window: 144 – 172 Volt at constant working pressure and output

Model Rated Performance Membrane vessels
400 – BMS – 2 21 gallons – 80 ltr./hour two 21″ vessels
600 – BMS – 3 33 gallons – 125 ltr./hour three 21″ vessels
800 – BMS – 4 42 gallons – 160 ltr./hour four 21″ vessels

Reverse Osmosis performance varies with the feed water temperature and salinity.
The rated performance is tested at 26ºC / 80ºF water temperature and salinity of 35000 ppm TDS.
*Also available in 36 VDC, 48 VDC, 90-96 VDC, and 180 VDC
**Prices shown do not include shipping, taxes, and/or customs duties (if applicable)

Key Features:

  • Three years warranty on all parts/components except consumables
  • Lifetime warranty on Stainless steel high-pressure pump head and R.O. pressure vessel
  • Spring-loaded automatic pressure regulator for constant working pressure
  • Extremely silent operation – no charge/discharge noise
  • No energy recovery pumps – No electronic circuits
  • Separate control panel for remote operation
  • Modular concept for space-saving installation
  • High-pressure hoses with O-ring sealed stainless steel field attachable fittings
  • Includes installation kit and comprehensive installation manual
  • Post-treatment pH buffer/hardener element saves up to 50% of product water.  Read more…
  • No proprietary equipment – Consumables may be obtained anywhere (except pH buffer element)
  • Immediate delivery from stock
  • 7 days a week top-notch support and after-sales care!

Are Watermakers Worth It If They Are Belt-Driven?

Opting for a belt-driven watermaker is a choice that many savvy users are finding to be truly worth it. These systems are designed with a focus on reliability and performance, making them a superior choice for those who demand consistent and efficient water production. The belt-driven mechanism operates with greater stability and less maintenance than traditional direct-drive systems, which often require more frequent servicing. With a belt-driven watermaker, you can expect a quieter and smoother operation, reducing wear and tear on the components and ultimately extending the lifespan of your system. 

How Much Does It Cost to Install a Watermaker on a Boat?

The cost of installing a watermaker on a boat can vary widely depending on several factors. These factors include the size and type of the watermaker, the complexity of the installation, and the specific needs of the vessel.

Typically, a basic, compact watermaker suitable for a small to medium-sized boat can range from a few thousand dollars to around $10,000. While it may seem like a large initial investment, it is important to note that this provides a consistent source of fresh water, reducing the need for carrying large quantities of bottled water. It also enhances self-sufficiency during extended journeys.

Engine-driven watermakers, which include some of the machines we manufacture, contribute to a more enjoyable and worry-free boating experience. Having one can ensure you have ample fresh water for drinking, cooking, and maintaining good hygiene while on the open water.

What Are the Best Belt Watermakers for Yachts? 

Among the top performers in the market are units that combine innovative technology with robust engineering to deliver a consistent supply of fresh water. These watermakers are known for their ability to produce ample potable water while being energy-efficient, ensuring you can enjoy your time on the open sea without worrying about water supply.

When investing in a watermaker for your yacht, consider factors such as production capacity, ease of maintenance, and adaptability to various power sources. This will help you ensure it aligns perfectly with your specific needs and vessel requirements. For example, the watermaker detailed here provides a great deal of water per hour, which could make your next voyage as comfortable as possible. Some of our other engine-driven options include those in the DML yacht series

What Is the Best Watermaker for Cruising Sailboats?

Selecting the ideal watermaker for cruising sailboats requires a blend of efficiency, reliability, and compact design. The best watermakers for sailboats are those that strike the perfect balance, providing a consistent supply of fresh water without consuming excessive space or energy. These systems are often compact, lightweight, and designed for the unique needs of sailboat owners. Cruising sailboats may need to have higher water capacity to power their crew’s water needs or amenities. 

More About ECHOTec Watermakers

ECHOTec Watermakers is one of the best watermaker manufacturers in the industry. We are dedicated to providing some of the best desalintors for sailboats and home desalination systems in the market. Contact us today to learn more about all that we have to offer when it comes to 12-volt marine water makers and our other models. 

Owners Manual

Standard System Features

Dimensions and Weight

Belt Driven (Powered by main engine)
500-BML-122 gallons - 83 ltr./hour900-BML-240 gallons - 150 ltr./hour1200-BML-353 gallons - 200 ltr./hourShare