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 ...

Toilet flappers (the valve seal in the toilet tank) can become old and worn-out. When this happens, water can seep through from the toilet tank into the toilet bowl.

Q: My toilet is causing me fits. The water from the tank is slowly leaking into the bowl, and I can’t figure out why. I have replaced the flapper, but the problem persists. What else should I do? A: ...