What kind of valve is this??

Discussion in 'Water Heaters and Softeners' started by gato11311, Oct 26, 2013.

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  1. Oct 26, 2013 #1

    gato11311

    gato11311

    gato11311

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    I am having a problem with leaking outside of my drain pipe from the water heater. I just replaced my TPR valve and noticed that there is still leakage. It must be this other little valve on the cold water inlet. It sounds like water is running through the pipe and there is no leakage except the constant drainage from the outer drain pipe. Question is: Does anyone know what this other valve is and where to buy another to replace it?

    IMG_20131026_173050.jpg
     
    Last edited: Oct 26, 2013
  2. Oct 27, 2013 #2

    johnjh2o

    johnjh2o

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    Can't tell from the picture but it's a vacuum breaker or a pressure relief valve.
     
  3. Oct 27, 2013 #3

    gato11311

    gato11311

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    The Temperature Pressure Relief Valve is not the problem. I just replaced that. It is the other one coming from the cold inlet that connects to the copper tubing right after the TPR. Are you saying it is called a vaccum breaker?
     
  4. Oct 27, 2013 #4

    johnjh2o

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    That's the one I was referring to in my first reply. Can't see enough of it to determine which it is.
     
  5. Oct 27, 2013 #5

    gato11311

    gato11311

    gato11311

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    I think it is another pressure relief valve after comparing others on the web. Thanks for pointing me in the right direction. Just wierd that I have two (the t&p and this one).
     
  6. Oct 31, 2013 #6

    camaroderrick73

    camaroderrick73

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    It's a mixing valve( I think)

    Never seen one like that maybe the knob is broken off of that but only way is to cut it out and replace it... No replacement parts
     
  7. Oct 31, 2013 #7

    johnjh2o

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    I don't think it's a mixing valve because it connected to the discharge of the T&P valve.
     
  8. Nov 2, 2013 #8

    klee181438

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    This is a thermal expansion valve. They are more trouble then they're worth. Id remove it and cap the line, then install an expansion tank on the cold water side. Problem solved
     
  9. Nov 2, 2013 #9

    klee181438

    klee181438

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    This picture shows the valve, usually made by Watts

    thermal expansion valve.jpg
     

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