Add Yahoo as a preferred source to see more of our stories on Google. A toilet flush valve controls the flow of water from the tank into the toilet bowl. It is made of a valve body, a flapper, and a ...

File this one under “Studies We Wish Had Let Us Remain Ignorant.” Scientists at the University of Arizona decided to investigate whether closing the toilet lid before flushing reduces ...

Led by Prof. John Crimaldi, the scientists started out by setting up a brand new lidless toilet, of the type commonly used in North American public restrooms. It was connected to a conventional ...