I, I am looking for some help on a possible venting issue. I had a plumber advise me and i think he might have been wrong and now i am having an issue with my toilet flushing properly. Diagram below of existing setup.
My question is, do I need another separate vent for my toilet? If yes can i tie into the existing dry vent in my diagram?
All other toilets in house flush fine except this one which is on the second floor.