Trying to track down an odor that has once again shown up, now that weather is getting warmer. I believe it to be a sewer odor, but no water leaks in the sewer pipes. House was built in 1910...with basement, so plumbing is easy to see.
The bathtub, vanity, toilet, and kitchen sink all go into the old cast iron main vent stack, and none of them were vented. I put an AAV on both the kitchen and vanity.
This odor only happens when it gets warm out...70-75 or warmer. Odor seems to come through strong into my closet, which is the backside of where the tub hooks in, but there's definitely water in the trap. Also I can smell it in the basement, and of course the HVAC sucks it in from the basement spreading it around to the entire house.
Just looking for ideas. Maybe a crack in the sewer vent pipe? Just frustrated at this point. I hired a plumber to at least check it out last Summer. His comment, "Well I don't have a real good nose to smell the odor." Ugh. Thanks for any recommendations!