Rule 1500 GPH Non-Automatic Bilge Pump - 24v 0. The Rule 1500 offers more pumping capacity and more exclusive design Specifications for Rule 1500 GPH Non-Automatic Bilge Pump: Manufacturer: Rule Color: Black Voltage: 24 volts Features of Rule 1500 GPH Non-Automatic Bilge Pump Gallons Per Hour: 1500 Operation: Non-Automatic Outlet Size: 1-1/8 Volts: 24v Package Contents: Rule 1500 GPH Non-Automatic Bilge Pump Rule 03: 1500 GPH Non-Automatic Bilge Pump - 24v