This heavy duty 12-volt pump is ideal for filling sinks and re-charging toilet tanks. DC-10 Pump features: water flow can be controlled at the nozzle with no damage to the pump system, flows to 20 GPM & pressure to 42 PSI, heavy duty cast iron housing with long lasting Noryl™ Impeller, 1 1/4" discharge with 1 1/2" intake, 1 HP 12 volt DC motor, no relief valve necessary. Includes a drain bolt located near bottom of pump. Please note, some installations may require a pressure switch, solenoid, and check valve.