The BE Pressure 85.300.022 is a 1/4-inch MNPT thermal relief valve that protects pressure washer pumps from heat damage during bypass. When a pump runs without the trigger pulled, recirculating water heats up fast; at roughly 145 degrees F this valve opens to discharge hot water and draw in cooler water, keeping seals, packings, and the pump head from cooking. It is an inexpensive safeguard for anyone running a cold or hot water pressure washer.
Built for
- Protecting triggered pressure washer pumps during bypass idling
- Preventing seal and packing failure from overheated bypass water
- Replacing a worn or stuck thermal valve on cold or hot water machines
- Adding pump protection to a custom or rebuilt pressure washer setup
Specifications
- Connection: 1/4-inch MNPT
- Opening temperature: approx. 145 degrees F
- Installs in the pump bypass loop or low-pressure port
- Brand: BE Pressure (BE Power Equipment)
Frequently asked questions
What does a thermal relief valve do?
It prevents pump overheating during bypass. When water recirculating in the pump reaches about 145 degrees F, the valve opens to release the hot water and let cooler water in, protecting the seals and pump head.
Where does the 85.300.022 install?
It threads into the pump's bypass loop or a low-pressure port using its 1/4-inch MNPT connection.
Will this fit my pressure washer?
It fits pumps with a 1/4-inch MNPT thermal port, which is common on many cold and hot water pressure washers. Check your pump's port size before ordering.
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