Rule Non-Automatic 12 Volt Bilge Pump With 1-18 Discharge The Rule Non-Automatic 12 Volt Bilge Pump With 1-18 Discharge features a high pumping capacity and reliability at a lower cost. Containing more exclusive design features than any comparable competitive pump. The bilge pumps are usually operated via a float switch or another level-sensing device with outputs between 1500 GPH to 4000 GPH. The Rule-10 2000 GPH is a high capacity submersible bilge pump that is typically installed with a three