Rule 1000. The Rule 1000 is in a class by itself and is a popular choice among boatbuilders and boat owners alike. 36 mounting variations and a gas resistant strainer base make this one of Rule's most popular pumps. 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 boat builders worldwide. Marine grade blocked wiring The Rule 1000 is in a class by itself and is a popular choice among boatbuilders and boat owners ali Silent and vibrationless operation. Anti-airlock protection No burn-out when run dry Rust and Corrosion protection Used by leading boat builders worldwide