Waukesha Positive Displacement Pump. Size: 2. Flow rate for new pump is 2.7 gpm with required horsepower and pressure. Discuss with salesperson your process and product to determine if this pump should handle your specific duty. Features include: stainless steel product contact surface, easy disassembly for cleaning, and 3-A and BISCC approval. (2) 2-3/8 in. stainless steel rotors. Inlet/outlet: (2) 1-1/2 in. ACME. Overall dimensions: 9 in. L x 5 in. W x 6 in. H.