I find it interesting that someone whose screen name indicates an affinity for low-tech engineering can't figure out how a toilet works. Perhaps indoor plumbing is new to him.
Actually, the screenname is a joke.
If you would like me to explain humor, I can do so but I suspect your ability to understand such an abstract concept is limited.
I know how it works, but if it gets clogged -- depending on the location of the clog -- I cannot necessarily do it myself. That is why we have specialists. Muckrakers if you will.