We recently moved into a resale house. It is on a septic system (a first for us). The drains seem to work ok, except that the toilets "burp" a bit sometimes when flushed.
While rummaging in the basement the other day, I discovered that the vent pipe going up to the roof had been cut off just before it disappears into the walls (with a sawzall or a chain saw, it's pretty rough).
I know not having a vent is a "bad thing". My question is, how serious is it? Do I need to get it fixed today, or can it wait a few months? Is it so serious that I should be going after the previous owner for concealing a dangerous condition? (looks like he did the plumbing renos himself, I can't see a real plumber doing some of the stuff I've found)