Double Diaphragm Pump Air Consumption (Maximum) 20 scfm Air Intake Connection Size 1/4 in Air Intake Connection Type NPT Check Seat Material Polypropylene Diaphragm Material PTFE Feet of Head (Maximum) 289 ft Flow Rate (Maximum) 13.1 gpm Manifold Connection Multiport Media Discharge Connection Size 1/2 in Media Discharge Connection Type NPTF Media Discharge Location Center Side Top Media Intake Connection Size 1/2 in Media Intake Connection Type NPTF