On Tuesday, February 20, 2018 at 1:44:07 PM UTC-5, David S wrote:
I have some piping in my shower that appears to have been bonded with somthing
other the solder. head does not affect it, almost looks like epoxy. Any
suggestions on how to break bond?

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Depending on what and where it is, why not just cut the pipe and remove
the bonded part.