Temperature or Pressure Relief Valve

Home Inspection Lingo

A Temperature or Pressure Relief Valve (TPRV) is a critical safety device used in plumbing systems, particularly in water heaters. Its primary function is to release excessive pressure or temperature buildup within a closed system, thereby preventing catastrophic failure such as explosions or ruptures.

In a water heater, for instance, if the temperature or pressure inside the tank exceeds safe levels due to malfunctions or overheating, the TPRV activates to relieve the pressure by opening and allowing water to discharge to a safe location, typically a drain pipe. This action helps to prevent the tank from bursting and causing damage or injury.

TPRVs are usually installed at the top or side of the water heater and consist of a spring-loaded valve mechanism. They are designed to automatically open when pressure or temperature surpasses a certain threshold, and they should be regularly tested and maintained to ensure proper functionality and safety compliance.

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