Pressure Plunger Pump, Discharge Connection Size 3/8 in, Discharge Connection Type BSP, Discharge Pressure (Maximum) 4,000 psi, Flow Rate (Maximum) 3.96 gpm, Intake Connection Size 3/4 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) 18 1/10 hp, Required Gasoline Engine Horsepower (Maximum) 15 1/2 hp, Lubrication Oil Bath, Shaft Outer Diameter 24 mm