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I need to tie-in a pvc pipe to an existing 4 in. pvc drain pipe. I plan to use a shielded fernco coupling. Is it okay to snake a pipe that has a fernco coupling? Will the snake tear up the fernco? The pipes are underground drainage lines that are outside of the house.

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    There's always that possibility after many passes with an aggressive cutter head (like a spiral cutter or a serrated "C" cutter), but I believe the Code Gods would have something to say against installing this kind of fitting and so far they haven't. – ojait Nov 5 '15 at 4:15
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    Typically the pipes will be nearly touching and the fernco just wraps around the outside of them. Do you anticipate a lot of fernco surface area showing to the inside of the pipes? – Joe Phillips Nov 5 '15 at 5:47
  • @Joe Phillips There will be a couple inch gap as I have to slide pipe back into the Y fitting's hub. – Laxmidi Nov 5 '15 at 15:01

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