Our systems are a unique all-in-one unit that is the size of a standard hot water tank and is easily installed by the plumbing contractor when installing the rest of the plumbing rough-in for the house.
Watch out for Toto toilets with modular roughs; they can fit any size rough-in with the purchase of an extra rough, but they also mean you'll have to move your water supply 3-inches to the left.
Before removing your old toilet or going out to purchase a new one, pull out the tape measure and find out what the rough-in measurement is.
A measurement called the rough-in is the distance from the wall to the center of a rear bolt on the toilet.
Measure your toilet's rough-in on the old toilet, or on the space where the toilet once was.
So if the number you got was 11-inches, purchase a toilet with a rough-in of 12.
This is your toilet's rough-in measurement.