m Ransley wrote:
You might get a bit of gas but probably not noticable, a bit of rain
water may come in eventualy. Best would be to caulk it up, maybe use
silicone.


Well its a small hole, and its right up against the drywall and the
anchor is lodged in the hole. Perhaps I can jam a bunch of silicone
cocking in there to further plug it up.

I bet if the sewer vent was actually in the center between the drywall
that I wouldn't have this problem.

Thanks,
Matt