Lately I've begun to smell sewage in one of my bathrooms. Of course I know that I'll have to call a plumber. What I'd like from you, though, is ideas about what might be causing it and whether it might be a high-priced or low-priced fix. I will call a plumber, but I need to know about how much money I should have available before I do so! (I've had two high-priced car repairs that have put me in the red for a short time.) I know this is a very general question, but I hope someone can do some educated speculation for me.
FYI, I've quit using the offending toilet for now.
Thanks in advance,