Cass said:
If the carrier had only 2 bolts, 1 on either side I might agree with you but with 4 everything will stay sandwiched and the carrier will just move with the wall. If you bolted the carrier, studs, and drywall to the toilet and had movable water lines and drain, the toilet could be hung on a swing and it wouldn't leak. Rotted studs have no bearing on a leak just as solid studs have no bearing on the leak. The studs keep the whole thing (carrier and toilet assembly)from moving.
Yes, the carrier does move with the wall, hence, the problem. The drain is NOT MOVABLE in this particular situation.
Why are you people fighting my first hand experience. I don't claim to be an expert in wall mount toilets, I'm just telling you what happened on this particular job. It is what it is...don't shoot the messenger because you don't like the message.
Looking at the picture, you tell me how the bottom of the seal gets pinched if the wall is not moving at the bottom. BTW, see the dented drywall from the bottom of the toilet. That was caused because the drywall was held in place by the bottom plate, so was immovable.
Here's a comparable example that might help you guys understand the problem...I run into this quite often in the area that I work:
Symptom: Floor mount toilet is rocking on cast iron toilet flange.
Cause: Over time, the house has settled/dropped. However the cast iron drain line did not settle/drop, which causes the toilet flange the stick up past the floor, thereby causing the toilet to rock.
This is essentially the same scenario as the wall mount toilet problem that I am trying to share with you...hope that helps...gotta run, my son is in for a visit.