Engineered to commercial standards. The Rule 2000 is the best selling high capacity submersible bilge pump in the world. 1-1/8" (28.6mm) discharge outlet. 12 Volts DC unless noted. Features: Fully Submersible Easy clean snap lock strainer Silent and vibrationless operation Anti-airlock protection Compact, efficient long life motor Ignition protected No burn-out when run dry Rust and Corrosion protection Used by leading boatbuilders worldwide marine grade blocked wiring