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Old 10-26-2013, 09:48 PM   #1
gato11311
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Default What kind of valve is this??

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  
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Old 10-26-2013, 11:44 PM   #2
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Can't tell from the picture but it's a vacuum breaker or a pressure relief valve.



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Old 10-27-2013, 03:47 PM   #3
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?

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Old 10-27-2013, 03:53 PM   #4
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Quote:
Originally Posted by gato11311 View Post
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?
That's the one I was referring to in my first reply. Can't see enough of it to determine which it is.
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Old 10-27-2013, 04:52 PM   #5
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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).

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Old 10-31-2013, 07:13 AM   #6
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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

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Old 10-31-2013, 12:05 PM   #7
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I don't think it's a mixing valve because it connected to the discharge of the T&P valve.

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Old 11-02-2013, 02:35 AM   #8
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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

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Old 11-02-2013, 02:40 AM   #9
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This picture shows the valve, usually made by Watts



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