AR North America direct drive gas Plunger pump 140° F - Max Water Temp 1/2â F - Inlet Thread 3/8âf - Discharge Thread 15 oz oil Capacity Specifications Max GPM 4 Max L/Min 15.1 Max PSI 4000 Ambar 275 Power EBHP 11 bore Dia mm 18 Stroke mm 7 Crankshaft ID Stamp 8 Inlet 1/2" F outlet 3/8" F Max Temp 140° F Oil Capacity (oz) 15 weight 21 rpm 3400 Shaft Size 1" Shaft Version D Shaft Type Hollow