Raritan Pressure Relief Valve - 75 PSI

The Raritan Pressure Relief Valve – 75 PSI (part number WH3) is a temperature and pressure relief valve engineered for tank water heater systems. This safety device protects water heaters by automatically releasing excess pressure when tank pressure exceeds 75 psi or temperature climbs above 210 degrees Fahrenheit, preventing dangerous overpressure conditions that can damage equipment or create safety hazards.

The 75 PSI pressure relief valve is a critical component in any tank water heater system's safety architecture. It operates through thermal and pressure sensing mechanisms, discharging controlled water spurts when either threshold is exceeded. This dual-function design—known as a T&P valve—addresses two independent failure modes: thermal runaway (uncontrolled heating) and pressure buildup from closed-system conditions or thermal expansion. The Raritan WH3 valve maintains this protection reliably across residential and light commercial water heating applications where code compliance and user safety are non-negotiable.

Homeowners performing water heater maintenance or replacement, plumbers servicing tank systems, and contractors upgrading or installing new water heating equipment rely on pressure relief valves like the Raritan WH3 to meet local plumbing codes and insurance requirements. This valve is essential for systems operating in closed-loop configurations where thermal expansion cannot be accommodated by expansion tanks alone, or where existing T&P valves have failed or reached the end of their service life. Proper installation and periodic testing ensure continued protection against the slow degradation that affects all pressure relief valves over time.

Water heater safety standards across North America mandate T&P valve protection on virtually all tank installations. The 75 PSI setpoint aligns with standard residential water heater design pressure ratings, making the Raritan WH3 a direct replacement for equivalent OEM and aftermarket valves. Choosing a manufacturer-specific or equivalent pressure relief valve ensures proper fit, correct pressure calibration, and compatibility with your existing water heater plumbing connections.