I think because the outlet isn't round. I've had the toilet over a year so it can't go back.
I was wondering if a DC115 band seal would make a better seal and I could put some 4" pipe into that?
Looks like a lip at the bottom:
I was wondering if a DC115 band seal would make a better seal and I could put some 4" pipe into that?
Looks like a lip at the bottom:
