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This 3/4 in pressure relief valve is used in residential applications to protect against excessive pressure on domestic storage tanks and tankless water heaters. It consists of a bronze body construction with 3/4 in MNPT inlet and 3/4 in FNPT drain outlet and stainless steel spring. It is listed and certified by CSA. The pressure relief is set at 75 psi (5.2 bar).
WATTS® 53 Series 0185643 Pressure Relief Valve, 3/4 in Nominal, MPT x FPT, 75 to 175 psi, Bronze Body