**Product Details:** - Low Pressure 3-Diaphragm Pump. - Made by John Blue. - Part # DP-193-GRIP. - Includes Gearbox For 3.5 And 5 HP Engines Along With A Regulator, Part # SC-2420-3. - Pump Head Designed With An Aluminum Die-Cast Core Inside A Polypropylene Build. - 316 Stainless Steel Washers, Diaphragm Bolts, Inlet And Outlet Check Valves. - Connecting Rods Are Constructed From A Special Bronze Alloy That Delivers More Economical And Trouble-Free Servicing. - 1" Diameter Drive Shaft On One Side. - Cooling System is Incorporated into the Die Cast Crankcase. - Life of The Pump is Extended as a Result Of The Short Crankshaft Stroke. - Negative Pressure With A Max of 4.9' And Intermittent At 9.8'. - 19.8 GPM Max Flow. - 218 PSI Max Pressure. - 550 RPM Max Speed. - 2.8 HP Max Power. - 140° F Max Temperature. - 1 1/2″ Suction Hose Diameter. - 1″ NPT Discharge Hose Diameter. - Uses 30 SAE Lube Oil.