Hello, I have an odd odor coming from my upstairs toilet. The smell is sort of sulfur/stinky. It could be a vent issue. I have two other toilets in the house (1 is exactly below the stinky one) and neither of these has an odor. The smell seems to be coming from the water in the bowl. I am assuming that there is a venting issue, but how would the smell be able to come up through the water? If anyone has any ideas what is causing this, and how to fix it, I would appreciate some suggestions.
thanks, Andy