Rule Pumps 25, Non-Automatic 500 GPH fully submersible 12 volt DC bilge pump provides outstanding quality and value. It is economically prices and designed for small boats. It features an easy clean snap lock strainer, silent and vibration less operation, anti-airlock protection, compact, efficient long life motor, marine grade blocked wiring, ignition protection, no burn-out when run dry and rust and corrosion protection.