Sahara 500 Automatic Bilge Pump: * Compact size and low-profile design allow installation in tight places * High- efficiency, permanent magnet motor uses composite brushed and permanently lubricated bearings for long life * Molded three-wire shaft seal perfectly centers motor shaft to prevent leaks and wear * Mechanical switch is simple, reliable and contains no toxic mercury * 750 GPH at open flow, 625 GPH at 3.3" head * 3/4" hose outlet