Warren Rupp Sandpiper Pneumatic Diaphragm Pump. Model: SB1-A. Type: SGN-4-SS. Flow rate for new pump is 32 gpm with required air consumption and pressure. Discuss with salesperson your process and product to determine if this refurbished pump should handle your specific duty. Features: ball valve and Teflon diaphragm. Inlets: (1) 1 in. dia. FNPT, (1) 1/2 in. dia. (air inlet). Outlets: (1) 1 in. dia. FNPT, (1) 3/4 dia. port. (exhaust). Overall dimensions: 1ft. 3 in. L x 11 in. W x 1 ft. 2 in. H.(ACN20a).