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.

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!