m Ransley wrote:

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.

I have on occassion used a combustible gas leak detector (TIF) to find
sewer gas leaks. Pretty good at pinpointing the source but depends
on the wind blowing right. But if the leak is inside a wall it won't
X-ray it for you...

Jim