I am a real estate broker in Western NY and I have had several clients over the years with this problem. When copper is used in this application for underground service it is rarely the rigid pipe but rather the flexible tubing in 1" size. I have heard pumbers cite this as one of the factors for this problem.
I have never heard the blame put on current leaks or the pipe being used as a ground. Prevailing opininon here is bad tubing and/or acidic soil conditions.
I am curious to learn what your readers think. John McManus
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