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Joe Joe is offline
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Default leaking p-trap joint

On Jan 24, 11:44*am, wrote:

snip



It's definitely a soldered COPPER drain stack. The guy that built this
house certainly had some odd preferences.


Not odd at all. That was code back in the 1950's and earlier.

Consider making the copper pipe round again by using a common tailpipe
expander such as auto shops use. Odds are it is oval right now and
further tightening just isn't going to work. You may have to cut off
the oval section and solder in a coupling and new round section. If
you do, try to find some Type K heavy wall for replacement. Good luck.

Joe