I just replaced the wax ring of a toilet leaking sewer gas, it still stinks in the room. House is 80 original drains. What is the most likely cause of the smell.
Can a clogged vent stack cause this smell. If so, why , it is only open at the exit on the roof- right. Windows are sealed closed. Or is it more likely a cracked drain pipe or bad seal of connected drain pipes.
What is the best way of finding the leak without ripping out floors and walls.