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keyserv t1_j9f241c wrote

A tankless toilet? Like a flushometer? You'd have to realign the closet flange and run a new rough in for the supply. It may be worth it if you really need that angle....

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atmetal OP t1_j9gp1ab wrote

Forgive me and my zero experience. I watched one manufacturer-produced installation video on youtube and the toilet appeared to have a supply hose coming from the wall like most toilets do. Why would supply plumbing need to be changed?

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openminded74 t1_j9gv5ts wrote

On a tank type toilet they use the atmospheric pressure from the water in the tank to create the flushing action but a toilet without the tank needs the volume and pressure from a larger pipe to do the same thing. A toilet flush valve is always 1" and sometimes if the pressure is to low it still can have problems flushing. Also the flushvalve needs a copper pipe coming out of the wall that is supported so it cannot move so the fitting to connect it can be soldered on and you don't want it to be able to move around or that will cause leaks where the pipe goes into the bowl.

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