Features: BRAND NEW PRESSURE WASHER PUMP. 4000 PSI / 4.0 GPM FACTORY RATING. SPECS: Max Volume 4 Gallon Per Minute Max Discharge Pressure 4000PSI Max Pump Speed 3,400 RPM Adjustable Unloader Shaft 1" Hollow Max Horsepower 13.75GPH Max Fluid Temp 140 Degrees Soap Injector Inlet Port 3/8" FPT Outlet Port 3/8" NPT, also equipped with female disconnect. .