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Water Heater TPR Valve is Not a Choice – it is a Requirement

Water Heater TPR Valve
Water heater TPR valve must be installed on every water heater (gas or electric).
TPRV – Temporary Pressure Relief  Valve
Water heater TPR valve is also known as Watts Temperature and Pressure Relief Valve. The pressure relief valve is usually located on top or side wall of the tank enclosure (tankless water heater safety valve, also known as T&P valve is located underneath the appliance).
Some old water heater tanks (1960s or earlier – they are still operating in some houses), were not equipped with pressure relief valves, and I would highly recommend replacement for safety and financial reasons [...]