Sorry, the web browser you're using is not supported by this website.

Please use Google Chrome, Firefox, Safari, or another browser to access homex.com. Thank you.

Skip to main content

We use cookies to enhance your experience. For details on how we use cookies, collect data, & how to manage your consent please see our Cookie Policy & Privacy Policy.

How do I replace a Thermal Relief Valve in a Gas Pressure Washer?

The thermal relief valve releases hot, high-pressure water from the pump system onto the ground in order to prevent damage to the pump. The hot water builds up when the spray gun is not being used. The pressure and temperature are controlled by the unloader valve. The thermal relief valve opens if the water gets too hot and dumps hot water on the ground. After the pressure is released, the thermal relief valve closes. The pump will not develop pressure if the thermal relief valve fails to open and the unloader valve fails to shut. The pump cannot build up pressure if the thermal relief valve fails to shut properly. The thermal relieve valve should be replaced if it fails to open and close properly.

Let's Get It Fixed!

HomeX virtual experts will assess your issue (for free!) and can resolve simple problems.

What Did You Think of This Article?

What Did You Think of This Article?