I bought a house that has a second bathroom in the basement. I would like to replace this toilet.
It appears to have a single water inlet and two over flow tubes. The refill hose tees into the regular overflow tube and into a second overflow tube. The second tube has a line out of the toilet tank and into the wall.
The tank model is a Proflo 3112 - E. I have not found any information online that refers to this setup.
What kind of toilet is this and where does the second overflow tube go?