12VDC, 4.5Ga/min, 6.0amp, 1/2" Hose & 1/2" ThreadSelf-priming diaphragm pump with 12v, 24v or 32v DC electric motor. Flow rates up to 17 litres/min (4.5 US gallons/min), pressure switch control, capable of pressures up to 3.2bar (45psi).Self-primes up to 2.4m vertical liftFour-piston design delivers higher flow ratesQuick-connect plug-in ports for easy installationPressure-switch control to run the pump only as needed