How to replace a pressure washer unloader valve | Repair guide
How to Replace the Thermal Relief Valve on a Gas Pressure Washer - Simoniz
Thermal Relief Valve 1/2" - MTM Hydro
Amazon.com: Tool Daily Thermal Release Valve for Pressure Washer Pump, 1/4 Inch NPT, 2-Pack : Patio, Lawn & Garden
Briggs & Stratton Pressure Washer Replacement Thermal Release Valve, 0.25NPT, 2250 PSI, Steel, Male Metric Fitting, Pack of 2 in the Pressure Washer Parts department at Lowes.com