Diaphragm Pump, Operating Pressure (Maximum) 45 psi, Diaphragm Chamber Design 5, Diaphragm Material Santoprene, Check Valve Material Viton, Discharge Connection Size 1/2 in, Discharge Connection Type FNPT, Flow Rate (Maximum) 5 gpm, Housing Material Polypropylene, Intake Connection Size 1/2 in, Intake Connection Type FNPT, Nameplate Voltage 12V DC, Priming Self-Priming, Pump Operation Type Electric, Pressure Switch Yes, Standards NSF Certified, Flow Rate @ 20 psi 4.1 gpm, Current 20 A