Pin hole leaks in copper plumbing
Posted by Paul on April 23, 1999 at 00:02:21:
I recently repaired my second pin-hole leak in two years. When repairing the leaky fitting I discovered that the 3/4" copper pipe had become very thin. Both leaks occured on the main supply line between the water meter and the water softner.

I measured the pH of the water at 7.6 - 7.8 using a freshwater acquarium test kit. So I basically have ruled out acidic aggressive water as the culprit. I am therefore assuming that the problem is the result of electrolysis.

Both my electrical breaker box and phone line have ground connections to my cold water supply line. This line runs approximately 50' to the water meter which has an electrical bypass strap across it. Can my problem be due to stray current flowing through my pipe to earth ground? This grounding approach appears to be pretty common though so I am not convinced that this is the cause of my problem.

My house is apx. 20 yrs old and I have city supplied water.

Any advice would be greatly appreciated.
Thanks,
Paul


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