Home>Discussions>PLUMBING>pin hole leaks in copper pipe
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JLMCDANIEL
Re: pin hole leaks in copper pipe
goldhiller wrote:

No need for such drastic changes in diet. Just add some fava beans and a nice chianti. :D

LOL-Well that one certainly took the screen and half the wall.:D
Jack

Fencepost
Re: pin hole leaks in copper pipe
goldhiller wrote:

No need for such drastic changes in diet. Just add some fava beans and a nice chianti. :D

Watch out for Mr. Potatohead offgassing. He's probably made in China.

Re: pin hole leaks in copper pipe

your problem was a combonation of a circulator with no timer/ thermostat (plugged in running 24/7) and unreamed tubing:eek: and most likely exessive oil based flux your lucky the leak was right at the heater.. i strongly suggest having a plumber or sparky install a timer or stat on the pump..

those solder joints in your photos were very poorly done you can see the section you unsweated the solder only partialy took

Re: pin hole leaks in copper pipe

I agree about the cause of the leaking. I don't know about excessive oil based flux. Your original post was what made me disassemble the whole system and replace all the copper. It is very obvious from the picture that the copper was not reamed and the erosion was immediately after the ridge where the turbulence from the water flow would be the greatest. This system was installed by a licensed plumber. He also installed other systems in houses in my subdivision. I have to assume their system has or will soon leak, also.

I have installed a timer on the pump but I think I would rather have a thermostat that controlled the pump. Any ideas on a thermostat would be appreciated. Thanks!

Shaun
Re: pin hole leaks in copper pipe

Just an opinion from a plumber, this erosion from turbulence from unreamed pipe is hogwash. It would not happen that fast.

Shaun

Re: pin hole leaks in copper pipe
Shaun wrote:

Just an opinion from a plumber, this erosion from turbulence from unreamed pipe is hogwash. It would not happen that fast.

Shaun

I was of the same opinion until I repaired my system. If you look at the picture of the short piece of copper, you can see that the sidewall has been eroded clear through. Each piece had similar erosion. The erosion was on the end where the water entered and it was immediately following the ridge left by not reaming the end.

I am not a plumber but I can look at the evidence and make an assumption based on what I see. If you have thoughts as to what would have caused the erosion on the the inside of the tubing other than water erosion, please post them here so we all can see them. I think that the ph of my water is close to 7 so I don't think it was caused by acidity of the water or something like that. The water was 130 - 140 degrees and was flowing 24/7/365. Bad copper? Thin walls?

Something caused the tubing to erode through in less than 4 years. Your thoughts would be appreciated. :)

Re: pin hole leaks in copper pipe
Shaun wrote:

Just an opinion from a plumber, this erosion from turbulence from unreamed pipe is hogwash. It would not happen that fast.

Shaun

"hogwash" huh..? lol you have to look at the facts in this case.. to any "plumber" this should be clearly obvious. you are generally right about velocity erosion due to unreamed joints taking time to show in a regular cold or hot domestic system. but on a recirc systems it is extremely crucial to ream if copper tubing is being installed. The reason why it gave so quickly was because the circ pump running 24/7 with the combonation of unreamed joints and most likely too much flux wich prevented patina build up and left the tubing naked. when i pipe in re circs i even go the extra mile and install long radius bend fittings in lieu of a timer or stat. the op stated that his ph is on normal levels so i'm curious explain to me how you would diagnose this tube erosion.
-Sean

allplumb1
Re: pin hole leaks in copper pipe

You could be dealing with a process called electrolysis. This is like a cancer that will continue to spread. rather than emptying your wallet on repairs. consider replacing the entire line. Use a poly ethylene product.

Re: pin hole leaks in copper pipe

buncha hacks on here

mellomark
Re: pin hole leaks in copper pipe

I just had my third pin hole leak in my utility room in the past year. Two where on the main vertical water line just inside the house and the third in a horizontal pipe down the line. We replace the sections of copper that had the leaks, but now I'm scared that we will never see an end to this. Is there anything we can do besides replumb the house? We are also in Maple Grove MN. The same location of the person that started this thread.

Thanks!

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