Fitting: 1/4" NPT. Male thread outer diameter is 0.55". Includes 2 pressure washer release valves. Compatible with many brands, such as Generac, Homelite, Karcher, Briggs, Power Stroke, Husky, Black Max, Craftsman, Him Ore and Ridged pressure washers. Replaces Homelite part numbers 678169004, 678169002 and 678169001. Replaces Briggs & Stratton parts 208673GS, 21783GS, 194298GS and B3090GS. Thermal relief valve protects pressure washer pumps operating within a safe temperature range to prevent overheating. When water temperatures reach over 300°F, pump seals can fail. The thermal relief valve thermal relief valve opens to release hot water and allow cold water to enter the pump. This keeps it running at a safe temperature. If the pump has already overheated, the thermal relief valve must be .
