Waukesha Model 420 Positive Displacement Pump. Model: 420. Flow rate for new pump is 648 gpm with required horsepower and pressure. Maximum speed: 400 rpm. Maximum pressure: 200 psi. Temperature range: -40ºF to 300ºF. Design features include: 316 stainless steel pump body and cover, non-galling Waukesha “88” alloy rotors and sideway mounting capabilities. Inlet/Outlet: (2) 6 in. ANSI flanges: diameter 6 in. (8) mounting holes dia. ¾ in. adjacent: 3-3/4 in. opposite: 9-1/2 in. *Note: Rotors are missing. Overall dimensions: 4 ft. 2 in. L. x 1 ft. 10-1/2 in. W. x 2 ft. 5 in. H.(ACN537)(H9).