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T&P Valve

WHAT IS THAT? Have you ever wondered what the strange valve is on the side or top of the water heater? In plumbing, this is referred to as a T&P Valve. This is an abbreviation for “Temperature and Pressure Relief Valve”.

The T&P Valve is an important safety device. If a water heater overheats and builds up pressure, the tank can explode or even shoot through the roof of the house! No kidding! This valve relieves excessive pressure to keep that from happening.

If this valve is leaking on your water heater, it is an indication that there is a problem. One thing you don’t want to do is plug up the valve to stop it from leaking.

Regulations say that a T&P Valve should open up if the pressure is higher than 150 psi or the temperature is up to 210 Degrees Fahrenheit. Most of the time it is high pressure that causes these to open. To fix the problem, a pressure reducing valve and expansion tank may need to be added or replaced. If the T&P Valve has opened up, it will likely need to be replaced as well because they don’t often shut off again once they have been running.

If you need help with a leaky T&P Valve, and are in our service area, feel free to give us a call.

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