Unused 451 GPM 316 SS Horizontal Centrifugal Pump.Mfg. by Durco (Flowserve). Model Mark III. 451 gpm @ 180' head. Size 2K4x3-10RV-7.56. Type MK3 STD. MDP 275 psi @ 100°F. 248°F. Casing: 316SS. Impeller: CD4M. 40 HP motor. Serial #1400944CHP008A. Designed as Pre-Coat Filter Aid Mixer Discharge Pump.