1200 - PRO - 3. 50 Gals/hour. The ECHO Tec. PRO series is designed for ultimate reliability and ease of operation. It supplies small to medium sized commercial vessels and large yachts with high quality potable water. The newly engineered marine aluminum frame provides a tidy appearance while allowing easy access to the systems components for maintenance. Self contained or semi modular concept for space saving, fast and easy self installation. All control systems are electro-mechanical. No electronic circuits close to seawater. Spring loaded automatic Duplex stainless steel pressure regulator. No leaking needle valves. High pressure hoses with O-ring sealed Duplex stainless steel fittings. No corroding or cracking compression fittings. RO pressure vessels with O-ring sealed Duplex stainless steel high pressure fittings - No cracking NPT end plugs. Corrosion resistant marine aluminum frame, epoxy primed and polyurethane top coated. Widely available commercial size sediment pre-filters (10"x 4.5", Big Blue) are standard equipment. Custom system configuration for tight installations at no extra charge. Five years limited warranty on the Duplex stainless steel high pressure pump. Post treatment pH buffer / hardener element saves up to 50% product water. No proprietary equipment - components may be obtained anywhere (except pH buffer element).