I suspect I have a plugged or clogged up vent pipe, because sewage smell is
coming out of the toilet.
I have tried snaking, vacuuming, hosing the vent pipe from the attic (cut
the vent pipe there to avoid going on the roof) to no avail.
The odor is so annoying, I'm ready to hire a plumber or cut open a wall and
the vent pipe to fix the problem. But whichever way, I need to be able to
tell if the vent is really plugged before the fix, and to verify it is not
plugged after the fix.
Are there ways to see if a vent pipe is plugged? I know it's not completely
plugged up because when I attach a vacuum at the attic, the toilet water get
sucked into the drain. However, when I stick a snake down from the attic, I
never can make it come out from the bottom at the crawl space. I believe
there are several 90 degree turns, such that when a stiffer snake is used,
it is too stiff to make the turns.
I called some plumbers and ask them if they have camera they can stick into
the vent pipe (2-inch diameter), and the answers are no, the cameras only
fit drainage pipes. Surely someone must have thought of the need to examine
a vent pipe?