ECHO TEC WATER MAKERS. AC POWERED SYSTEM. MODEL 900-AML-2. 38 Gal per hour. two 40 inch membrane vessels. 115/230V 60hz - 220V 50hz. The modular system is space saving and easy to install. As for all other ECHO Tec. Watermakers only highest quality components that have proven to withstand continuous duty in a harsh marine environment are selected for unsurpassed reliability and lifetime. For ultimate corrosion resistance, all wetted components including the high pressure pump head, the true regulating pressure valve and the high pressure fittings are made from Duplex stainless steel. For sailing or motor yachts with generators of 4.5 KW or more the ECHO Tec. series AML/S with 50 or 60 Hz AC motors is the right choice.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.