Pressure Plunger Pump Discharge Connection Size 3/8 in Discharge Connection Type BSP Discharge Pressure (Maximum) 2 500 psi Flow Rate (Maximum) 3.5 gpm Intake Connection Size 1/2 in Intake Connection Type BSP Motor Speed (Maximum) 1 750 RPM Piston Design Triplex Pump Head Material Forged Brass Plunger Material Ceramic Required Electric Motor Horsepower (Maximum) 7 1/2 hp Required Gasoline Engine Horsepower (Maximum) Not Applicable Lubrication Oil Bath Shaft Outer Diameter 24 mm