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Thread: pinholes in copper

  1. #1

    Default pinholes in copper

    Hello plumbing doctors. I have seen several comments on the forum about this problem. We have lived in our homes 25 years. At the end of our addition we have 7 homes on 1 acre lots. Well water 18 grains hard, Pretty high alkaline. Cant remember how high but borderline high. no iron, small mount of dissolved solids. great taste. my Dads copper and a neighbor 6 houses away cannot go 3 months without repairing copper. Soft side or hard same problem. 5 other neighbors no problems at all. The copper gets so thin you can crush it in your hand. also in both houses the inside of the pipe gets a very bright green coating. My pipes have never had this. My dad put his ground from the electric circut box right into the basement floor(very dry basement) with a normal ground rod. Could this be the problem? the rod would never get moisture. I am ready to believe the problem may not be the water.
    HELP!!!!!!!!
    Thanks sooo much for your help and your much needed opinion

  2. #2
    Master Plumber Redwood's Avatar
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    Default

    Are these homes on a comunity well, or, individual wells?
    Individual wells may vary.
    The grounding may be a factor.

    You are facing a problem that is difficult to find the exact problem and cure.
    There may be several individual problems adding up into a combination problem.
    There is a lot of information here on copperpipe corrosion for your reading pleasure.
    http://www.copper.org/

    You are asking the right questions and looking in the right areas.
    Good luck on finding your cure.

    In some cases (many) it is far easier just to repipe using a material such as PEX or CPVC.

  3. #3
    That's all folks! Gary Slusser's Avatar
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    There are many causes for pinholes in copper tubing but electrical grounding is a prime cause. Dad should move is ground electrode (rod) and then test how good a ground he gets; less than 25 ohms is code and when not met, more rods are needed.

    Phone, security system, and any other drounds on teh water lines is also a cause. So is bacteria, high DO and CO2 or TDS content. Hot water recirculation is too.

    Here is probably the best web site for all things to do with 'corrosion'.

    www.corrosion-doctors.org and a search of the site for copper tubing here.

    http://www.google.com/custom?q=coppe...on-doctors.org
    Gary Slusser Retired (= out of business)
    Click Here to learn how to correctly size or program a water softener.
    CAUTION, as of Nov 12 2013 all YouTube videos showing how to rebuild a Clack valve have an error in them that can cause damage.

  4. #4

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    Thanks everyone, I now have some direction Terry this site is so very helpful.

  5. #5

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    Sorry, Yes it is a private well

  6. #6

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    Quote Originally Posted by Gary Slusser View Post
    There are many causes for pinholes in copper tubing but electrical grounding is a prime cause. Dad should move is ground electrode (rod) and then test how good a ground he gets; less than 25 ohms is code and when not met, more rods are needed.

    Phone, security system, and any other drounds on teh water lines is also a cause. So is bacteria, high DO and CO2 or TDS content. Hot water recirculation is too.

    Here is probably the best web site for all things to do with 'corrosion'.

    www.corrosion-doctors.org and a search of the site for copper tubing here.

    http://www.google.com/custom?q=coppe...on-doctors.org
    Gary, Thanks you are very helpful. I was thinking That I would put the ohm meter in series with the rod and the ground wire. But I thot I had better check . I would like to end this nightmare forever.
    Steve

  7. #7

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    Quote Originally Posted by blacktop37 View Post
    Gary, Thanks you are very helpful. I was thinking That I would put the ohm meter in series with the rod and the ground wire. But I thot I had better check . I would like to end this nightmare forever.
    Steve
    You need a specific test rig to check the resistance of a ground rod to the ground. I've never seen it done, most electricians would just drive 2 rods to meet code.

  8. #8

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    Quote Originally Posted by blacktop37 View Post
    Gary, Thanks you are very helpful. I was thinking That I would put the ohm meter in series with the rod and the ground wire. But I thot I had better check . I would like to end this nightmare forever.
    Steve


    Be careful. If there is a problem with the neutral wire provided by the electric company, there is a potential major shock hazard if you remove the ground wire!

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