2000 Warren Rupp Sandpiper II ™ Double Diaphragm Pump. Model: S1FB1P2PQAS100. S/N: 689872. The S1F pump Frame has a maximum flowrate of 45 GPM, maximum solids handling of .25 in., and maximum discharge pressure of 100 PSI. The displacement per stroke is 0.17 gallons. Standard duty non-metallic pumps are ideally suited for highly corrosive fluids, intermittent demand, portable, low abrasive fluids, and suspended solids. Maximum recommended air pressure: 100 psi – 7 bar. (1) 1 in. dia. flange inlet. (4) 5/8 in. mounting holes. 2-1/4 in. adjacent. 4-1/8 in. opposite. (1) 1 in. dia. flange outlet. (4) 5/8 in. mounting holes. 2-1/4 in. adjacent. 4-1/8 in. opposite. (1) 7/8 in. airline inlet. Note: unit has a broken flange. Overall dimensions: 1 ft. 6 in. L. x 1 ft. W. x 2 ft. ¼ in. H.