AR North America | Vertical Axial Radial Pressure Washer Pump | 2400PSI | RMW22G24EZSX Specifications: 2.2 GPM at 2,400 PSI and spins at 3,400 RPM. This pump mounts directly on to the engine shaft by using a keyed hollow shaft connection system Pump body in die-cast aluminum alloy, two bearing systems to support the pump shaft and 3-piston alternating volumetric pumps for use on cleaning units, can be directly coupled to various types of motors Pistons in hardened and tempered steel, driven by swash plate mechanism The pump includes a built-in pressure control valve, downstream chemical injection system, EZ start valve and thermal relief valve This pump is for vertical gas engine driven units. The mounting flange provides a convenient connection to most 7/8 diameter shaft vertical gas engines in 4 - 7 HP and fits most OEM carts