Doesn't need to be an older home. I have installed a few and when laying out the center of the drain you use the rough in dimension + the finished wall thickness and the result is the top of the tank just rests against the wall. I purchased the toilets from a real supply house so all bets are off if the big box versions don't match the quoted rough in dimension as seems to be the case.
I was referring to mechanical damage. But yes, I can see where having particularly destructive tenants (not uncommon I'm sure) could change things, and a piece of wood mounted to the wall sounds like a reasonable answer.
Our tank is a good 2-3 inches from the wall and my 400 pound BIL hasn't broken it yet...
BOTTOM LINE...i just installed Kohlers..12" rough. @ 10 3/4" MINIMUM!!!! Fr om the *1/2" thick BASEBOARD that was used the tank LID barely....i mean ba rley rested into placed...so i shouldnt need to explain that the tank is ON THE WALL....12" rough tank...10 3/4" is all you got....10 1/2" will NOT wo rk..(maybe...maybe the 1/4 difference could ride depending on the brand of toilet, style of lid, etc.) SOOOOO...an OFFSET FLANGE will move 1 1/2" away from the wall...so chip the finish floor (its not a lot) OR. catch it on the top off framing...but 10
3/4" with drywall..baseboards. TOTAL for a 12" tank.No he is not....
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