Pressure Relief Valve Leaking On Pressure Washer

The thermal release valve allows hot water to exit the pressure washer if the water temperature becomes excessively high.

Pressure relief valve leaking on pressure washer.

When the thermal relief valve opens cool water enters the pump and cools the system. It is rare for an unloader valve to fail to allow the water to by pass when the trigger gun is released but it does happen. Oem 5140095 85 replacement pressure washer valve thermal relief dh4240 for dewalt. A must have for every pressure washer.

You are now ready to get your overflow pipe removed from your pressure relief valve. Only 5 left in stock order soon. The pressure washer is left running while it is not spraying water the water in the pump will begin to heat up. 4 7 out of 5 stars 11.

When the water temperature rises above the acceptable limit the thermal. Extreme pressure within the system could cause the boiler or water lines to rupture. Replace a defective leaking valve right away. Step 4 overflow pipe removal.

More buying choices 19 18 14 new offers homelite new 1 4 thermal release relief valve for pressure washer water pumps by the rop shop. That depends on whether the pressure relief valve is leaking around the threads where it attaches to the hot water tank or if it is leaking out of the inside of the valve itself. If the pressure washer runs for more than 5 minutes when the spray wand isn t in use the water in the pump often overheats causing the thermal relief valve to open and discharge hot water onto the ground. This valve functions is as a safety backup to the unloader valve.

If the thermal release valves seal is compromised it may continuously leak water and cause the washer to lose pressure. Safety pressure relief valves ever seen a pump explode. From there the valve that is at the very bottom will need to be opened up. If the temperature and pressure within the boiler are in the normal range and the pressure relief valve is leaking it is a sign the valve is defective.

The thermal release valve is a fairly cheap component and can be easily replaced by unscrewing the old valve and screwing in a new one. The leak could be due to the normal operation of the thermal release valve.