Asked by: Vasile Tessmann
asked in category: General Last Updated: 4th February, 2020

What is water heater pressure relief valve?

Water heater temperature and pressure relief valves, or T&P valves, are a safety feature found on all tank water heaters. It's designed to open temporarily and discharge short spurts of water when the temperature exceeds about 210 degrees F, and it releases pressure if the tank gets above 150 psi.

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Also asked, what is the purpose of a pressure relief valve on a water heater?

The purpose of the temperature pressure relief valve is to release water, and in turn lower the pressure inside the tank, in the event that the temperature or pressure gets too high in your water heater.

Secondly, how do you test a pressure relief valve on a water heater? How To Test Your Temperature And Pressure Relief Valve

  1. REMOVE THE DRAIN PIPE. Next, take the drain pipe off of the valve. You may need a plumber's wrench for this.
  2. LIFT THE TEMPERATURE AND PRESSURE LEVER. Gently lift up the T&P valve's lever, but make sure to not push it all the way up. If you do, it will lock and the water heater will drain.

Also to know is, do all water heaters have a pressure relief valve?

All water heaters are equipped with a temperature and pressure relief valve. This valve will allow water or steam to escape from the water heater if the temperature or pressure gets too high; these valves are set to open when the pressure reaches 150 psi, or when the temperature reaches 210 degrees.

How often should pressure relief valves be replaced?

If no date is specified, a pressure relief valve shall be replaced no later than five years following the date of its manufacture.” In industrial refrigeration, the current recommendation is to replace the relief valve on a five-year cycle.

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