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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
  • Some soils and groundwaters contain trace amounts of sulfuric acid that eats any kind of metal water pipe over time.

    I one time changed out a well pump for a female friend and this time she decided to invest in a Grundfos stainless steel submersible pump. The groundwater 30 and 40 feet down is of good quality EXCEPT for the sulfuric acid content and in her neighborhood water heater warranties are void. When I put in the pump I made provisions for hooking up an acid neutralizer which is a tank that you periodically fill with crushed marble while the water pressure is turned off.

    I rather doubt that a dissimilar metal that is in the soil and which is connected to the electrical system grounds is causing the problem because copper is near the bottom of the electromotive table. Only gold, silver, and a few other elements are more electronegative than copper. The cathodic corrosion protection current for the gas line could be finding its way into the water line but I rather doubt that.

    However, gas lines should be separated 3 feet horizontally or vertically from any other utility for a number of safety reasons. Besides preventing a backhoe operator from digging through electrical and gas lines at the same time, there was an instance where a water main break underneath a street forced its way into a natural gas main in a small town and all the gas appliances had water coming out of the burners just like a slapstick comedy.

    I would bet that what you have is a bad factory run of copper pipe. I one time bought some chlorinated polyvinyl chloride ( CPVC ) pipe from the closest place. Every section of pipe split when I turned on the water pressure because the extrusion parameters were somehow wrongo! I took everything down and returned the defective pipe, got my money back, and bought some pipe and fittings from somebody else. Replacement pipes and fittings worked perfectly.

    Mike Cole, mc5w at earthlink dot net

    Michael R. Cole

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