Double Diaphragm Pump Air Intake Connection Size 1/4 in Air Intake Connection Type BSPT Diaphragm Material PTFE Flow Rate (Maximum) 20 lpm Media Discharge Connection Size 3/8 in Media Discharge Connection Type BSPT Media Intake Connection Size 3/8 in Media Intake Connection Type BSPT Media Temperature (Maximum) 140 Degrees F Operating Pressure (Maximum) 87 psi Priming Self-Priming Viscosity (Maximum) 1 cps Wetted Housing Material Stainless Steel Standards RoHS Valve Type Check