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View Full Version : Plumbing routing in crawlspace



dan orourke
07-20-2007, 12:38 PM
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Brian E Kelly
07-20-2007, 12:57 PM
That was what is called thumb gum. It is usually used where a/c lines go into the house. It is probably used for expansion and contraction of the pipe. That copper is soft copper and not sure it is k-copper which it should be.