ECHO TEC WATER MAKERS. BELT DRIVEN SYSTEM POWERED BY MAIN ENGINE. MODEL 900-BML-2. 38 Gal per hour. Two 40 inch membrane vessels. The Belt Driven Systems are ideally suited where the main engine runs more than once a week. They produce 8 - 60 gallons per hour of fresh water even on a small yacht without a generator. Instead of draining your batteries you will charge them every time you run the engine and make tons of water at the same time. An additional pulley and space for the quite small lhigh pressure pump on the motor is required. The supplied U-brackets help to install the pump on the engine like a second alternator. ECHO Tec. belt driven watermakers are equipped with a patented automatic pressure regulating valve. This device ensures constant working pressure on changing engine RPM, a must on every propulsion engine driven watermaker. All wetted components including the high pressure pump head, the regulator and all high pressure fittings are made from Duplex stainless steel. Three year limited warranty - Duplex stainless steel high pressure pump head and RO pressure vessel guaranteed for life. Post treatment pH buffer / hardener element saves up to 50% product water. No proprietary equipment - components may be obtained anywhere (except pH buffer element). Modular concept for space saving installation. Separate control panel for ease of operation. No energy recovery pumps - No electronic circuits. Spring loaded automatic pressure regulator for constant working pressure and smooth flow.