Installation of ‘rear discharge’ toilet
I have been asked to install a new ceramic tile bathroom floor over on top of an existing floor. The bathroom uses a rear-discharge toilet and the homeowner has requested that I tile under the toilet as opposed to cutting the tile to fit around the toilet. The new tile will raise the level of the floor (and the toilet) about 3/8″. From what I understand the center line of the discharge opening is supposed to be 4″ above the floor to meet the waste pipe in the wall. I spoke with the company that makes the toilet (Crane) regarding how exact the 4″ spec must be adheared to. They were unwilling to state that there was any leeway provided.
Question:…Will raising the toilet 3/8″ by tiling under it cause a problem or should I cut the tile to fit around the toilet?
Thanks
Replies
Depends
I'm more familar with wall hung rear discharge toilets. They have no wiggle room because the mounting bolts and closet flang are all in one unit.
My guess is that a floor mount rear discharge would similar in placement requirements. It there are bolts coming out of the wall that secure the toilet to the flang you can bet that they are intergal with the flang.
The only way to really tell is to remove the toilet and see if there is any movement , up or down, in the hold back bolts. again, my gues is no, because the flang will be similar to a wall mou urinal flang (larger of course), and the bolts are treaded rod that screw into the ears on the flang.
I'm not sure what type seal a residential rear discgarge has,but commerial ones have a hard foam rubber seal. Before you pull it, be sure you have the correct replacment seal for it.
When I put in my Duravit/Toto wall hanger I used a Geberit bracket and it had about 8" of vertical adjustment. You are still opening up the wall to do that tho.
http://gfretwell.com/ftp/new%20room/Plumbing.jpg
Yeah, the OP should check whether there is reasonable access to behind the wall somehow, and whether the outlet can be "urged" upward a bit. Depends on how much play is in the pipes, among other things.