Situation: I'd like to eventually upgrade my toilet from a cheap, manual flush (need to physically apply foot pressure) to an affordable one that has a "walk away" flushing mechanism. It doesn't matter to me whether the unit is designated for "RV" or not, there seems to be plenty of small 10" toilets available. The rough-in size for mine is 8 1/2". It seems the smallest "UniFit" rough-in adapter would expand the rough-in to at least 10".
Question: Perhaps there are rough-in adapters for a 8 1/2" rough-in available on the market? If it's safe to use "UniFit" adapter, what should the installer keep in mind?