The flush valve, located in the middle of the toilet tank, includes the overflow tube, the hole where water enters the bowl when the toilet is flushed and the rubber tank ball or flapper that covers the hole when the tank is full. A broken flush valve prevents your toilet tank from forming a seal to hold water in the tank. If you hear your tank leaking, first try replacing the flapper. If that doesn't work, replacing your flush valve will help conserve water and keep your toilet operating properly. This guide will teach you how to replace the flush valve in just three easy steps.
And its steps :
