Reply To: Pin holes in copper pipes

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    Pinhole leaks are very rare in copper pipe inatallations. In fact, I have nerver encountered a true pinhole leak in properly installed copper pipe in my 30+ years of plumbing un the USA.

    I HAVE encountered such leaks in BRASS pipe installations, mostly in so-called “yellow brass” (as opposed to “red brass”) pipes. This is allegedly due to the leaching of zinc from these pipes. I presume that this is a problem because brass is an alloy of copper with zinc. Pure copper pipe should not present this problem, though as a poster has said there may be problems relating to the carbon structure in annealed copper pipe…even if I’ve never seen it…

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