Thermal Relief Valve - 1/2" MPT, 140°F

Thermal relief valve with a 1/2" MPT connection. When the pump runs in bypass with the gun closed, the water recirculating in the head heats up; at 140°F the valve opens and dumps the hot water so cooler water can enter, protecting seals and packings from heat damage. Mounts in a 1/2" port on the pump head or manifold.