Rule 1500 GPH Marine Bilge Pump, Non-Automatic A genuine Rule product, don't settle for anything less More pumping capacity and more exclusive design features than any comparable competitive pump at a lower cost 1-1/8 inch (28.6 millimeter) hose barb discharge outlet, 12 Volts DC, limited 3 year warranty Silent and vibrationless operation. Stainless steel shaft, completely submersible, rust and corrosion protection Compact, efficient, long-life motors, able to run dry for short periods