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Hypro 3312-0004 Thermal Relief valve 145 degree 1/2 inch Male Pipe Sensor

Thermo relief valve is designed to save the pump from hotter water than 145 degrees.
Protect pumps from premature failure of seals, packing and cups by eliminating heat build-up in closed loop by-pass systems. Automatically seats during unloader / regulator pressure spikes to prevent fluid bleed.

Valves open when temperature exceeds temperatures shown. Provides high temperature protection without interruption in flow.
Compatible with systems using either unloader or regulator valves.
1/8" Fip opening for outbound water
1/2" Mip screws into pump head on suction side or by pass loop on a tee fitting
On truckmounted carpet cleaning machines, 1/8" Fip end is hosed to the waste tank or through van floor.
max 10 gpm 
With the threads unit is 1.5" long

Also marketed under part number(s):
HY3312-4

1/2 Mip X 1/2 Fip X 1/2 Fip Street Tee Brass 28248 [BR258]

A00076  1/8" Npt by 1/4" barbed brass fitting AKA 32004