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Pressure releif valve leaking - Whirlpool Water Heaters

Posted by ljones92 on


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Hot water pressure relief valves serve two functions. The first is to remove high-pressure water from the hot water tank. The second function is to act as a high temperature valve to remove water that exceeds a predetermined point for the valve. Both of these relief settings are preset at the valve factory. Many pressure relief valves will come with a metal tag that identifies these release points. If you're attempting to remove the hot water heater pressure relief valve, pay careful attention to ensure that you replace with the correct valve.

Your hot water heater has a pressure relief valve safety mechanism. When pressure inside the water tank exceeds certain limitations, the valve opens up to allow the pressure to be released. A faulty pressure relief valve will not release excess pressure, which could cause extensive damage to your home. You should test the hot water heater pressure relief valve once every six months to ensure proper operation. If the pressure relief valve fails the test, replace the valve with a new one immediately

Locate the pressure relief valve on your hot water heater. The pressure relief valve has a lever handle on top with a drain pipe attached to it. The pressure relief valve is most often on the side of the water tank toward the top. Newer models of hot water heaters have the pressure relief valve on top of the water tank.

  • Inspect the area around the pressure relief valve for signs of leaking water. If there is leaking water near the relief valve connection, replace the relief valve. If no leaking is evident, proceed with testing the pressure valve.

  • 3

    Examine the area below the pressure relief valve drain pipe. Most water heater closets either have a drain in the floor below the pipe or the pipe is inserted into another pipe to direct the water out of the home. If the end of your drain pipe is not in another pipe or there is no drain in the floor, place a bucket under the drain pipe to catch water when you test the pressure relief valve.

  • 4

    Pull the lever handle on the top of the pressure relief valve up with your fingers. A working lever will lift up without difficulty.You should begin to hear water going through the drain pipe. Slowly release the lever to shut off the pressure relief valve. The pressure relief valve is good. If you did not hear water running through the drain pipe, lower the lever on the pressure relief valve and replace the valve. If the lever is difficult to raise, do not force the lever. Replace the pressure relief valve.

  • Now with all that said if you have a closed loop water supply system and you have a pressure vessal/expantion tank it may have gone bad and is making the TP valve leak. you can call your water provider to see if you have closed loop system.

    Posted on Feb 04, 2011


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    SOURCE: my releif valve wont stop leaking

    The pressure relief valve only leaks when there is excess pressure in the system, possible causes could be excessive static pressure, overheating, faulty pressure vessel or undersized pressure vessel.

    Posted on Apr 11, 2010



    • 248 Answers

    SOURCE: newly installed solar edwards hot water system and

    system over/pressurised check overheat statbest of luck

    Posted on Oct 31, 2009

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    Related Questions:


    Water came out on the overflow pipe and kept running.

    The releif valve will open if the water gets to hot to discharge hot water out or the relief valve is gone bad and needs to be replaced. the relief vlave protects the heater from high heat and build up of pressure from it over heating.

    Water heater overflowing

    Is it coming out the releif valve on the side or top. If so it can be replaced, just shut water,power and drain down and replace.It is a standard 3/4" thread and not to costly.
    Now it is the drain valve at the bottom turn everything off and drain it down and replace the drain valve.

    Check out these links below for pictures and details to help you with this issue.
    This link is for Pressure relief valve testing and replacement.

    The link below has an in depth details of how to change a drain valve out.

    Overflow pipe flowing

    Check temperature off the water for proper functioning thermostat. Look at set points on heater's thermostat. It's made to let water out when water get's to a certain high temp. More than likely it will be the pressure relief valve going bad and not holding.

    T&P releif valve can be replaced on heater. Turn water off and remove with a pipe wrench. It will come out and any hardware store will carry it. T & P pressure relief valve is 3/4 threads.

    When installing new one use teflon tape on threads.

    My releif valve wont stop leaking

    The pressure relief valve only leaks when there is excess pressure in the system, possible causes could be excessive static pressure, overheating, faulty pressure vessel or undersized pressure vessel.

    Water heater keeping running

    Check releif valve and make sure it is not running out of it. Sounds like the releif valve may be bad.

    It's on the side of the water heater with a lever on it they are for safety reasons, they go bad from time to time. It may be piped through floor to a drain or outsude.


    I have a propane hot water tank that in discharging the hot water out the relief valve (Champion energy saver series)

    possible problems not knowing age of unit the
    control valve could be sticking open allowing gas to continue to flow until high limit is reached and shuts down valve another possible problem with the newer style back flow preventer being install by water companys the rapid heating and expansion of the water over pressures the water system causing releif valve to pop open and reclose most water heater manufacters are recommending instalation of an expansion tank to allow the growth in volume of water somewhere to go is valve constantly leaking or only during heating cycle if you could supply additional information does unit only leak when heating
    or is steam expelled when releif valve opens
    t-stat not opening gas valve sticking partially open
    bad high limit bad pressure releif valve no expansion tank to allow for thermal expansion if steam is present and unit is boiling water inside replacement of water heater for safety concerns,would be reccomended if only water and pops couple of times water temp not over 140 degrees after most hot water has been used out of tank and is reheating most of capacity probably lack of expansion tank as the releif valve is the final safety device on a water heater is of great concern
    the temp control gas valve or high limit are supposed to shut unit done long before the safety limit of releif valve is reached

    Your Question My oil burner company removed my pressure relief valve. Do I need it

    with out a temperature/pressure releif valve a water heater becomes an illegal BOMB
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