I've been having problems with sewer gases in bathroom and I think putting a vent would work. Can you guys please help? I've been trying to upload a picture, but its too big. I'll try again later if you guys can't help w/o one. I have everything going into the house from this one stack where there is a vent. Then there is the 2 sinks from that one pipe coming into the house. the drain for the toilet and shower continue outside of the house until they come in. I'm getting sewer gases in the bathroom and I think putting a vent outside the bathroom will solve it. There is definitely a Ptrap on the every fixture. My question is will adding a vent at the place in the pic below fix the problem?