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Pump Protectors

Thermal Relief Valve | Pump Protector Valve | High Temperature Safety Valve

These pressure washer pump protectors are commonly called thermal relief valves, as they are designed to protect the pump from high temperatures within the pump head. Leaving a trigger gun closed while the pressure washer is on is called 'running in bypass.' If left in bypass for extended periods of time (more than 2-3 minutes!) the water within the pump head heats up, which can cause damage and failure of the pump seals and valves. Thermal relief valves open at 145 degrees or 190 degrees, to protect the high pressure pump from damage.

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9.802-182.0 General Pump Thermal Relief Valve, Opens at 145 Degrees F, 1/2 inch Thermal Relief Valve 1/2"
9.802-182.0

Opens at 145 Degrees F

Our Price: $8.88
High Temperature Thermal Relief Valve protects pressure washer pump from damage, Opens at 190 Degrees F, 1/2 MPT Thermal Relief Valve 1/2"
9.803-670.0

Opens at 190 Degrees F

Our Price: $18.85
Thermal Relief Valve High Pressure Pump Protector, Opens at 145 Degrees F, 1/4 inch Thermal Relief Valve 1/4"
8.712-544.0

Opens at 145 Degrees F

Our Price: $22.23
8.707-250.0 Pressure Washer Thermal Relief Valve Pump Protector, Opens at 190 Degrees F, 3/8 MPT Thermal Relief Valve 3/8"
8.707-250.0

Opens at 190 Degrees F

Our Price: $17.99
9.802-181.0 Thermal Relief Valve Opens at 145 Degrees F, 3/8 inch Thermal Relief Valve 3/8"
9.802-181.0

Opens at 145 Degrees F

Our Price: $7.43