Replace your pressure washer pump head with this RMW/SRMW Complete Pump Head Kit (AR42940) from AR North America. It is designed to work with their RMW/SRMW Series pressure washers. This assembly kit includes the pump head, water seals, check valves, unloader valve, chemical injector, E-Z start valve, thermal relief valve, and an inlet/outlet tube. Will Not Fit: RMW2.5G28 or SRMW2.4G28