Pressure Washer Thermal Relief Valve Repair

If your pressure washer is not building pressure and the engine is surging there could be a few different causes.

Pressure washer thermal relief valve repair.

Pressure washer safety valves pressure and thermal relief. Zgn 1 4 npt brass thermal relief valve thermal release safty valve for homelite ryobi dewalt pressure washer 678169004 17658 5 0 out of 5 stars 1 12 99 12. Pressure thermal relief safety valves for the power washing industry from brands such as annovi reverberi cat general pump je adams giant more. When the pressure in the line builds to a certain level the relief valve is pushed open and allows excess pressure to escape rather than allowing it to build up in the line.

When the rated water temperature is exceeded the thermal relief valve automatically discharges the hot water onto the ground and lets in the new cooler water. The thermal relief valve helps you operate you pressure washer safely. When the thermal relief valve opens cool water enters the pump and cools the system. The valve that is leaking is probably the thermal release valve part number thermal relief valve the leak could be due to the normal operation of the thermal release valve.

One of them is a sticking unloader valve. The thermal release valve allows hot water to exit the pressure washer if the water temperature becomes excessively high. 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. When the pressure in the line builds to a certain level the relief valve is pushed open and allows excess pressure to escape rather than allowing it to build up in the line.

The gas engine pressure washer s thermal relief valve helps protect the pressure washer s pump against thermal damage. This part regulates the amount of pressure in the line at any given time. This item oem 5140095 85 replacement pressure washer valve thermal relief dh4240 for dewalt tool daily thermal release valve for pressure washer pump 1 4 inch npt 2 pack hotop 2 pieces 1 4 inch pressure washers replacement thermal release valve 678169004 brass.