Pressure Washer Pump Head for SRMW/RMW RMW2.2G24 AR42518 AR43061 AR42940 Kit by | Jul 22, 2026AR42518,AR43061,AR42940. This assembly kit includes the pump head, water seals, check valves, unloader valve, E-Z start valve, thermal relief valve, and an inlet/outlet tube. (Showing as the picture).