Hypro D70 Diaphragm Pump with Gearbox - 9910-D70GR Includes gearbox to adapt the Hypro D70 diaphragm pump to a 5.5 HP gas engine Max. 19 GPM flow ; Max. 290 PSI pressure ; Max. 3600 RPM speed ; Max. 140 deg. F temperature Pulsation dampener included 3/4" hollow shaft Self-priming operation ; Weighs 31 lbs. ; Regulator NOT included