Belt / Engine Driven Watermakers (Modular)

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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 fresh water per hour, even on the smallest yacht without 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.

ECHOTec belt driven watermakers are equipped with an automatic pressure regulating valve. This device ensures constant working pressure on changing engine RPM, a must on every propulsion engine powered watermaker.


Only highest quality raw materials that have proven to withstand continuous duty in a harsh marine environment are selected for ultimate reliability and lifetime. Therefore, all wetted components including the true regulating pressure valve and all high-pressure fittings are fabricated from identical high-grade austenitic stainless steel.

For most economical maintenance and global use, ECHOTec manufactures all components to international standards. Filters, membrane elements and many spare parts can be obtained anywhere.


Free Duplex Package

with any BML Yacht Watermaker

DUPLEX (2205 / S31803 / 1.4462) is more costly and more difficult to form and machine but achieves almost twice the corrosion resistance of 316 stainless steel.


DUPLEX has been successfully used for all high pressure fittings and pressure regulators of ECHOTec commercial desalination systems as an option for yacht watermakers.

See all options


The Duplex package comes with a lifetime warranty. (If for any reason a DUPLEX regulator or fitting ever fails, we replace it. Period)

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Samples of BML series customer installations (click on images to enlarge)

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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  

  • Triplex plunger pump for low revolution and pulsation free raw water flow

  • Spring loaded automatic pressure regulator for constant working pressure

  • Extremely silent operation – no charge/discharge noise

  • No energy recovery pumps  -  No electronic circuits

  • High rejection R.O. membranes with a three-year pro-rated warranty

  • Separate control panel for remote operation

  • High pressure hoses with O-ring sealed stainless steel field attachable fittings

  • Modular concept for space saving installation

  • Post treatment pH buffer / hardener element saves up to 50% product water.    Read more...

  • No proprietary equipment  -  Consumables may be obtained anywhere (except pH buffer element)

  • 7 days a week top notch support and after sales care!

AC Watermaker Installation – AML and PRO Series
(ECHOTec. Promotional Video)

DC Watermaker Installation 260-DML-1
(courtesy: Riley and Elayna, SY "La Vagabonde")

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Selection of Vessels
equipped with
ECHO Tec. Watermakers


"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 your desalination system. Therefore, we have decided to use an ECHOTec watermaker again on our new project: the first circumnavigation on an electro-powered catamaran without sails and any fossil fuel."
Michael Köhler, MV "Solarwave"          
Read More Testimonials

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"I can’t thank you enough for seeing us through the installation and for designing and building such a high quality watermaking system. I was eager to get the word out about Echotec to future cruisers, which is what prompted me to write an article about the system for Cruising World."
Emily, SY "Groovy"

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"Having recently passed Captain Cook's "Thirsty Sound" inside Australia's Great Barrier Reef it seemed a good time to send a note thanking you for my excellent water maker.  Given the choice I shall never sail without one.  There are surprisingly many boats with your equipment on board and without exception we are all very happy with our water-makers and the excellent and prompt back-up you have given us."
John Kirkus, SY "Bluesipp"                 
Read More Testimonials

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Please contact us with your enquiry/order