Pressure Relief Valve Leaking On Pressure Washer

You are now ready to get your overflow pipe removed from your pressure relief valve.

Pressure relief valve leaking on pressure washer.

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. Safety pressure relief valves ever seen a pump explode. The leak could be due to the normal operation of the thermal release valve. The thermal release valve allows hot water to exit the pressure washer if the water temperature becomes excessively high.

If the thermal release valves seal is compromised it may continuously leak water and cause the washer to lose pressure. The pressure washer is left running while it is not spraying water the water in the pump will begin to heat up. The seal on the thermal release valve like most seals on the pump will wear with. This will allow your pressure relief valve to be opened up so that it will have a chance to drain the water out of your tank.

When the water temperature rises above the acceptable limit the thermal. This valve functions is as a safety backup to the unloader valve. Extreme pressure within the system could cause the boiler or water lines to rupture. 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.

When the thermal relief valve opens cool water enters the pump and cools the system. In either case start by replacing the pressure relief valve using a different brand in case the valve itself is defective. From there the valve that is at the very bottom will need to be opened up. 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. Step 4 overflow pipe removal. 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.

Only 5 left in stock order soon. Replace a defective leaking valve right away.