Annovi Reverberi triplex residential plunger pump flows 2.2 GPM at 2400 PSI and spins at 3400 RPM. Equipped with industry standard 7/8" shaft, comes with generic 22mm x 14mm hose connections, also provide with flange bolts, flange nuts, soap hose, 3pcs nozzle tips (0 40 Soap) and key. Built-in EZ-Start Valve diverts water by-pass when starting engine, relieving pressure and making it easier to turn over on repeated rope pulls. And can cause low system pressure if functioning improperly Easy to install exact replacement for your pressure washers. Simply slide the pump up onto the engine shaft, fitted with a keyway, and tighten the bolts securing the units to the frame and to each other. The mounting flange provides a convenient connection to most 7/8 diameter shaft vertical gas engines in 4-7 HP (reference the cc to HP chart) and fits most OEM carts.