I am a professional handyman with the need for some advice.
A female customer says she smells sewer gas when she flushes the toilet
in a small powder room.
I don't smell it.
The toilet is an full volume Kohler.
I changed the flapper because it was not working right. Works perfectly
now, but she says the smell is still there.
I don't think it is the wax seal because the toilet is rock solid with
no water leaks. Also, wouldn't you smell it at other times if the seal