AlGreen
Member
First time poster. We have two and a half baths, and the second floor sink has started gurgling after running water, though it drains fine. Nothing else in that bathroom or the others is gurgling. So far I've only tried some Drano and then baking soda and vinegar a few days later. No change. The sink doesn't have an overflow and I assume it's tied into the main vent. I've wondered if the vent might be clogged because there's also an inexplicable smell (like butt) coming from the space behind the 2nd floor bathtub faucet and drain (there's a small door that gives me access to the pipes there). I've attached pictures of the plumbing under the sink and behind the tub. Thoughts?
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