If water does not enter the overflow tube yet runs into the bowl nevertheless, repair or replace the flush valve in the base of the tank.

If necessary, adjust or refasten the refill tube so that water flowing out of it empties fully into the overflow tube.

Wait till the tank fills, then take off the lid and see if the water comes up to within half an inch below the top of the overflow tube.

Should something go wrong and cause the refill valve to keep running, the toilet's overflow tube prevents a flood.

If the water fails to shut off there is an overflow tube that carries excess water down into the bowl to prevent the tank from overflowing.

One of the most common fail-safe systems is the overflow tube in baths and kitchen sinks.

Water is fed to the tank to replenish its supply, and a smaller flow is directed into the overflow tube to refill the bowl.

A. It sounds as if the water level in the tank is too high and water is running out into the bowl through the vertical overflow tube.

This lowers the float ball a little so it will shut off the water sooner, before it gets to the top of the overflow tube.

Water in the tank should rise no higher than the factory-printed mark on the inside and should stop one-half inch below the top of the overflow tube.