The Rule 500 gph Bilge Pump can run dry for up to 2 hours for convenience and can be operated by using a float or hydroair switch. Designed for small boats and to fit in the lowest part of the bilge for efficient pumping, the pump features a 3/4 inch discharge outlet for easy setup. 12 Volt DC for powerful pumping. Can be converted to side or transom mounted pump with Model #66 adapter. (not included). This pump can be used for livewell/baitwell recirculating applications. Perfect for PWC's. Easy to clean snap lock strainer. Silent and vibrationless operation. No burn-out when run dry. Rust and Corrosion protection.