Double Diaphragm Pump Air Consumption (Maximum) 16 scfm Air Intake Connection Size 3/8 in Air Intake Connection Type FNPT Check Seat Material Polypropylene Diaphragm Material Santoprene Feet of Head (Maximum) 231 ft Flow Rate (Maximum) 11 gpm Manifold Connection Single Port Media Discharge Connection Size 1/2 in Media Discharge Connection Type NPT Media Discharge Location Center Top Media Intake Connection Size 1/2 in Media Intake Connection Type FNPT