Liquid Ring Vacuum Pump Includes Motor No Number of Stages 1 Motor Type Pedestal Bare-Shaft Free Air Flow Rate 20 cfm Maximum Vacuum 29 in Hg Output Power 1.5 hp Housing Material Cast Iron Impeller Material 316 Stainless Steel Inlet Size 1 in Inlet Type FNPT Inlet Gender Female Outlet Size 1 in Outlet Type NPT Outlet Gender Female Maximum Speed 3 500 RPM