Automatic Demand Water System Pump Operating Pressure (Maximum) 35 psi Diaphragm Chamber Design 2 Diaphragm Material Santoprene Check Valve Material Viton Discharge Connection Size 3/8 in Discharge Connection Type Barbed Flow Rate (Maximum) 1 gpm Housing Material Polypropylene Intake Connection Size 3/8 in Intake Connection Type Barbed Nameplate Voltage 12V DC Priming Self-Priming Pressure Switch Yes Standards CSA Certified IAPMO Duty Cycle Intermittent