335 GPM @ 39 PSI Bryon Jackson DVMX Horizontal Centrifigal Pump 3x4x9D 335 GPM Very Large 9 Stage Pump w 400HP Electric Motor. Model# DVMX, S/N# 92MMOO71, 3550 RPM Ft/Hd: 2635 SP 39 PSI, DP 1086 PSI. Rotaion CCW. 67% efficency. Driven by GE, 400 HP, 3575 RPM, 4160 volt, 509LS frame motors. Built 1992.