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Discussion Starter · #1 ·
Hi .... I have a strange situation & hopefully someone can help. Warm water is getting into my cold water pipes. If I run a tap on my second floor, cool water runs for a bit but then turns warm for bit & then the water turns cold?

I added a picture of my setup. The pipe marked 2 is the cold water pipe coming from my well & it feels cold to the touch. The pipe marked 1 is the cold water pipe that leads to the house & it feels warm. The pipe marked 3 leads to the top of the hot water tank & it also feels warm.

Any ideas on what is going on please? Thanks
 

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Discussion Starter · #3 ·
Imo, perfectly normal. wh probably doesn't have heat traps and some of the water sitting in the pipes for awhile will be warm till it runs for a bit. Just my opinion.
Just seems strange that it has never done this before & we have lived here for many years & have not had any plumbing work done in years.
 

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Discussion Starter · #6 ·
Thanks for your reply Dan. I did run out of water recently while showering but thought it was maybe because another family member had recently had a shower. Having said that, I cannot remember running low on hot water before. Can a dip tube be repaired/replaced? Thanks
 

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Also if your second floor pipes run next to heat ducts in a common chase water in the pipes can get warm.
 
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Do you have any Moen single handle faucets or tub/shower faucets. They can fail and allow water to pass cross the faucet while it is off.
 
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I have a strange situation & hopefully someone can help. Warm water is getting into my cold water pipes
This can be an indication of a failed faucet cartridge.........:wink2:

Please itemize all the components of your domestic water system. This will help with the 'guessing'
 
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Discussion Starter · #17 ·
This can be an indication of a failed faucet cartridge.........:wink2:

Please itemize all the components of your domestic water system. This will help with the 'guessing'
I made a big mistake with the explanation in my original post. The pipe highlighted as #1 is the pipe leading from my well, the pipe highlighted as #2 feeds the house with cold water but the pipe feels warm. The pipe highlighted #3 enters the top of my water heater tank.

The pipe numbered 2 should feel cold but it feels warm along with pipe #3 that I think should also feel cold. I don't think this issue has anything to do with any faucets does it? Thanks
 

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Discussion Starter · #18 ·
To everyone trying to help me I apologize because I made a big mistake with the explanation in my original post. The pipe highlighted as #1 is the pipe leading from my well, the pipe highlighted as #2 feeds the house with cold water but the pipe feels warm. The pipe highlighted #3 enters the top of my water heater tank.

The pipe numbered 2 should feel cold but it feels warm along with pipe #3 that I think should also feel cold.
 

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Here are a couple of thoughts:

Do you have a water heater expansion tank? If so, that probably failed. You can try pumping it back up, or checking the air charge, but they are cheap so I would just exchange it.

The other thought I had was that if you had use a heat trap nipple/ dielectric nipple or union, then the little balls that prevent the heat from migrating the wrong way have failed.

Either one will cause the hot water to flow back into the cold water line.
 
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