Wilden M15 Double Diaphragm Pump with Stainless product contacts. Model: M15/SO. Capacity: 150 gpm @ 100 psi. Suction lift (dry): 20 ft. Suction lift (wet): 25 ft. Maximum particle size: 3/8 in. Maximum capacity: 230 gpm. Air supply (max): 125 psig. 316 Stainless steel wetted housings, aluminum non-wetted housings, Teflon PTFE diaphragms, Teflon PTFE valve balls. The Wilden pump is an air-operated double diaphragm, positive displacement pump. Inlets: (1) 3/8 in. dia. air quick connect fitting, (1) 3 in. dia. S-line fitting. Outlets: (1) 3 in. dia. S-line fitting. Overall dimensions: 21 in. L x 15 in. W x 32-1/2 in. H.