Material - Aluminum construction for a durable, lightweight assembly with high hardness, high temperature resistance, and corrosion resistance. Replaces part numbers - AR42518 - AR43061 - AR42940 Compatibility - Fits RMW SRMW pumps including: RMW2G20, RMW2.2G24, RMW2G23B, RMW2G24, RMW2G25, RMW2.2G20D, SRMW2.2G26. Kit contents - Pump head - Water seals - Check valves - Unloader valve - Chemical injector - EZ start valve - Thermal relief valve - Inlet/outlet tube Key benefits - Comprehensive rebuild kit for compatible RMW SRMW pump models, enabling reliable operation and reduced downtime. - Aluminum construction provides a balance of strength and light weight, suitable for demanding high-temperature and corrosive environments. - Includes all essential components for a complete rebuild: seals, valves, injector, unloader and relief valves, EZ start valve, and inlet/outlet tube. - Replaces multiple part numbers, simplifying maintenance and stocking. Use scenarios - Service shop or field maintenance: use this kit to overhaul a worn pump head and seals on a pressure washer, restoring performance and preventing leaks. - Fleet maintenance for commercial cleaning: perform regular rebuilds on multiple units to minimize downtime and extend pump life across a cleaning operation. - Agricultural or industrial spraying setups: install the chemical injector and related valves for controlled chemical delivery within compatible spraying applications.