Double Diaphragm Pump Air Intake Connection Size 1/2 in Air Intake Connection Type NPT Check Seat Material PTFE Diaphragm Material PTFE Flow Rate (Maximum) 90 gpm Manifold Connection Single Port Media Discharge Connection Size 1 1/2 in Media Intake Connection Size 1 1/2 in Media Intake Connection Type NPT Media Temperature (Maximum) 212 Degrees F Solid Diameter (Maximum) 0.28 in Valve Material PTFE Wetted Housing Material 316 Stainless Steel Valve Type Ball