This article was posted 11/20/2006 and is most likely outdated.

Newsletter Member Needs Help
 

 
Subject - Newsletter Member Needs Help

November 20, 2006  

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Newsletter Member Needs Help

Mike,
In December of 2005 I had two water leaks in my front yard, caused by pin-hole leaks in my copper water line. The leaks in the pipes were from the street to the house, thus the responsibility to repair was left up to me and not to the water supplier. My home is 4 years old and I do not understand why I should have such a problem with a newer home.

I called a plumber to repair the two leaks and from what he says it appears to be either a problem with bad copper piping or electrical current going through the copper pipes. Because I was not the original owner of the home, but the second owner, the builder said they were not responsible to repair the leaks. Remember, this was back in December of 2005. Well, this week my neighbors on both sides of me have encountered the same problem with water leaks. Although they have not had their problems repaired yet, the plumbers that have looked at their leaks do confirm that it is again, either bad pipes or electric current passing through the pipes. I do have a ground wire running from my electrical box and grounded on the inside to the copper water pipe line.

Also I have found out that all the wiring (i.e. phone, cable, gas, electric) is in a tunnel ditch going across the copper water line from the water meter to my house. I live in Kentucky were the building codes permit such utilities to be tunnel placed as such.

Mike Holt Comment: It's my understanding, based on studies by the American Water Works Association (AWWA), that alternating current flow does not create this problem. I'm willing to change my opinion if someone has a study to support the claim that pin hole leaks can be created in metal piping because of current flow. Do you have any thoughts?

 

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Comments
  • It may be possible that there is small amout of induction on to the copper pipe through the distribution panel in the house. This is possibly causing the pipe to act as an anode such as in a cathodic protection system, Where postive voltage is injected into the ground through an anode bed system and the negitive side would be attached to the metal property being protected. If there is copper pipe in the ground in this case, most likely it is discharging small currents into the electrolysis when it should be retriving postive voltage to polarize the surface of the pipe. Suggest changing the pipe to PVC until it reaches grade or above. Most likely the water pipe should only be grounded at the water heater with a #6 AWG conductor and return path directly to earthing rod at service entrance, Not thru the distribution panel.

    Mike Edwards

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