Heavy Duty Thermal Release Valve for Pressure Washer Pumps Replacement Fit Al… by | Jul 27, 2026Valve Type Thermal Relief Valve. 【Universal Thermal Release Valve】Made of solid brass, with better air tightness and corrosion resistance. Replaces Briggs and Stratton parts 208673GS, 21783GS, 194298GS and B3090GS.