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PL-1/4-THERMO

$12.99

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Overview

The PL-1/4-THERMO is a thermal relief valve with a 1/4" male NPT inlet that protects your pressure washer pump from heat damage. When water trapped inside the pump reaches 140°F, the valve opens and dumps the hot water so cool water can take its place, keeping the pump seals and unloader from cooking. Heat like that builds up most often in bypass mode, when the trigger is off and water recirculates inside the pump without flowing out. The aluminum-alloy body threads into the pump manifold. If the valve starts leaking, it's either worn out or your water got hot enough to trip it and cause damage, so replacing it is critical to your pump and unloader's lifespan.

What's included

  • Opens at 140°F to dump trapped hot water
  • 1/4" male NPT inlet threads into the pump manifold
  • Protects pump seals and unloader from heat damage
  • Aluminum-alloy body
  • Guards the pump during bypass and recirculation

Specifications

Inlet
1/4" MNPT
Max Temperature
140°F
Body Material
Aluminum Alloy
Function
Thermal relief for pressure washer pump

Frequently asked questions

It dumps hot water out of your pump when the temperature inside reaches 140°F, then lets cool water take its place. This protects the pump seals and unloader from heat damage during bypass, when the trigger is off and water recirculates inside the pump instead of flowing out.

It has a 1/4" male NPT inlet that threads into the pump manifold or a matching 1/4" female NPT port. Confirm your pump has an open 1/4" NPT thermal relief port before ordering.

A leaking valve is either worn out or it tripped because your water got hot enough to cause damage. Either way, replace it. A stuck-open or weeping valve no longer protects the pump, and running without a working one puts your seals and unloader at risk.

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Complete the setup

22533A

22533A

SKU: 22533A

$19.99