Double Diaphragm Pump, Air Consumption (Maximum) 100 scfm, Air Intake Connection Size 1/2 in, Air Intake Connection Type FNPT, Check Seat Material Aluminum, Diaphragm Material Buna-N, Feet of Head (Maximum) 289 ft, Flow Rate (Maximum) 81 gpm, Manifold Connection Single Port, Media Discharge Connection Size 1 1/2 in, Media Discharge Connection Type NPTF, Media Discharge Location Center, Media Intake Connection Size 1 1/2 in, Media Intake Connection Type FNPT, Media Intake Location Bottom