Double Diaphragm Pump Air Consumption (Maximum) 18 scfm Air Intake Connection Size 1/4 in Air Intake Connection Type NPT Check Seat Material PVDF Diaphragm Material PTFE Feet of Head (Maximum) 230 ft Flow Rate (Maximum) 11 gpm Manifold Connection Multiport Media Discharge Connection Size 3/8 in Media Discharge Connection Type NPTF Media Discharge Location Center Side Media Intake Connection Size 3/8 in Media Intake Connection Type NPT Media Intake Location Center Side