General Pump 100679 Thermal Relief Valve – 3/8" MPT, 190°F for Pressure Washers

General Pump 100679 Thermal Relief Valve – 3/8" MPT, 190°F for Pressure Washers

Protect your pressure washer pump from excessive heat with the General Pump 100679 Thermal Relief Valve. Featuring a 3/8" Male NPT connection and a 190°F temperature rating, this valve helps protect the pump from heat damage caused by excessively hot recirculating water.

When water temperature reaches the valve's operating point, the thermal relief valve opens to discharge hot water, allowing cooler incoming water to enter the pump.

Specifications:

• Brand: General Pump

• Part Number: 100679

• Type: Thermal Relief Valve

• Inlet: 3/8" Male NPT

• Maximum Temperature: 190°F

Applications:

• Hot water pressure washers

• Cold water pressure washers

• Commercial cleaning equipment

• Pressure washer pump systems

• Unloader bypass systems

Features:

• 190°F temperature rating

• 3/8" Male NPT connection

• Automatically relieves excessively hot water

• Helps protect pump seals, packings, and other internal components

• Helps reduce heat-related pump damage

• Simple, automatic operation

• Genuine General Pump component

What it does:

When a pressure washer operates with the trigger gun closed, the unloader may place the pump into bypass and recirculate water. Extended bypass operation can cause the recirculating water temperature to rise rapidly.

The thermal relief valve provides an additional layer of pump protection by opening when the water reaches its specified temperature, releasing hot water so cooler water can enter the system.

Why it matters:

Excessive pump temperature can contribute to:

• Damaged seals and O-rings

• Premature packing wear

• Water leaks

• Reduced pump life

• Costly repairs and equipment downtime

A properly functioning thermal relief valve is an inexpensive way to help protect one of the most important—and expensive—components on your pressure washer.

Important:

This 190°F model has a higher temperature rating than common 145°F thermal relief valves. Always replace a thermal relief valve with the temperature rating and connection size specified for your equipment.

The General Pump 100679 is a dependable replacement for pressure washer systems requiring a 3/8" MPT, 190°F thermal relief valve.

Not sure whether your machine requires a 145°F or 190°F thermal relief valve? Reach out—we'll help you get the right part the first time.