right, i've noticed no particular smell from these bubbles.
occasional air bubble in toilet
Aug 30, 2009
21 Replies
I don't think you can use smell to confirm anything. If the plumbing is vented properly and in working order any atmospheric pressure in the drain pipe should be vented out the vent at the top. It should not be forcing air back out of the toilet. It's an old house so either improperly installed plumbing or a clog could be the explanation.
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required