2004 Warren Rupp Sandpiper Double Diaphragm Pump. Model no. S1FB3P2PPUS000. Approximate capacity: 45 gpm. Handles solids up to ¼ in. (6mm) in size. Complies with product temperature ranges of: 32°F to 180°F. Maximum recommended air pressure: 100 psi. Features a ball check valve with a 1:1 ratio design. Check valve seat material: polypropylene. Diaphragm / check valve materials of construction: PTFE Santoprene / Backup PTFE. Wetted material: polypropylene. (1) 1-1/4 in. FNPT inlet dia. (1) 1-1/8 in. flange outlet dia. 4 mounting holes ¾ in. dia. 2-3/8 in. adjacent, 3-1/4 in. opposite.(1) ¾ in. FNPT airline inlet. Overall dimensions: 1 ft. 5-1/8 in. L. x 1 ft. W. x 1 ft. 9-1/4 in. H.