Question about Rheem 40 GAL ELEC TALL Water Heater 6YR SC 82VH402

2 Answers

Pressure valve releases sometimes , I lose a good bit of water. When i tap the valve handle, it shuts off.

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  • HANK MCNEIL May 11, 2010

    Sounds like you have a thermostat that's sticking on some times, have you ever noticed the water to be hotter than normal?

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2 Answers

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Turn off the breaker, drain the water heater so that the level is below the pressure relief valve and replace the pressure relief valve. Fill it up again and turn the breaker back on. P.S. to prolong the life of the tank drain the minerals off the bottom of the tank once every few months. When the minerals stay on the bottom they eat away at the tank.

Posted on Apr 24, 2009

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  • Master
  • 10,865 Answers

The pressure release valve is a safety feature. If it is leaking alot, it could be that the valve needs to be replaced or it could be that the high temp. shutoff in the hot water tank is malfunctioning.

Posted on Apr 20, 2009

  • Joe Hogan Apr 20, 2009

    The pressure release valve is a safety feature. If it is leaking alot, it could be that the valve needs to be replaced or it could be that the high temp. shutoff in the hot water tank is malfunctioning.

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1 Answer

I have a Rheem Hot water heater that has a broken valve release. The part that turns on the valve. How can I drain it if I can not get this part to turn?


Turn off the main water to the house , turn off gas to heater open lowest hot tap to take pressure off .Undo union on hotwater tap outlet on heater more water will come out , open cold tap at sink that will take pressure out of main . you should be able to change valve with out getting too much wet .

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Our gas water heater (Rheem Optima Quick recovery 81 series) heats the water as evidenced by the steaming water we can release from the temperature and pressure relief valve but we get no hot water from...


Sounds like a plumbing problem.

Since no tap gets hot water, chances are good the problem lies in the hot water pipes between the water heater to the first Tee.
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Or sediment lodged in elbow or Tee.

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Rheem RTG-64DVN model, brand new unit installed during the weekend. fired up but shout down automatically within about 5 seconds. showed error code 12.


contact your gas company if the error code is "12," indicating that the gas supply was interrupted.

have a good day !! In LP models, the 12 error code may also appear if the LP gas supply has gotten low. To clear the code, replace or refill the LP gas supply.

go here for a list of codes for rheem tankless water heaters-- www.ehow.com/list_7833182_error-rheem-gas-water-heater.html

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1 Answer

Pressure releif valve leaking


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.

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    Now, the pipe that leads from the base water pan should lead to the wall where the water can go outside. If you see water in it, but very little in the pan, then you have water from outside (rain or water hose) coming inside the house. You should have a valve, usually on the side of the water tank near the top that looks like brass with a silver 'flip' handle on it. There may be some plastic pvc pipe attached to it as well. If the water is coming from this valve then you need to have the valve replaced. You may get some extra time by gently tapping the valve where the handle is attached with a mallet so that the valve seats itself. This valve is a pressure release valve. If the water in the tank gets too hot or water pressure gets too high, this valve will open to relieve that pressure. it doesn't happen often, so if this is the first time you have seen it and it doesn't seem to be leaking any more, I would not worry about it. If it is still leaking, you can get a replacement relief valve from your local Lowe's or hardware/lumber yard. They usually cost less than $20 USD

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    I can't turn the bar pressure up on my Vaillant VCW 221 Boiler


    on the pipework below there may be a silver braided hose with one or two valves on the end. turn the valve(s) so the handle is inline with the pipe this will allow water from the mains supply into the heating circuit , remember to keep an eye on the pressure gauge. fill the system to 1bar cold then shut down the valve(s). turn on the boiler and it should be ok, if you lose pressure again then you may have a leak somewhere which needs to be found.

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    Hi, it appears you have a defected relief valve. you can try one solution. lift the handle on the relief valve and let some water out. sometimes that can flush out materials thats blocking the stem in the valve. if it's still leaking it must be replace.

    If this doesn’t work for you please write back. Thanks,

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