1999 Waukesha Positive Displacement Pump. Model: 18. Flow rate for new pump is 18 gpm with required horsepower and pressure. Discuss with salesperson your process and product to determine if this pump should handle your specific duty. Motor: 230 volts. Drive: 103 rpms final. (2) 3-1/2 in. rotors. Inlet/outlet: (2) 1-1/2 in. ACME. Features 316 stainless steel product contact surface. This pump meets 3A and BISCC standards and approval. Overall dimensions: 3 ft. L x 9 in. W x 1 ft. 6-1/2 in. H.