Turn off the water supply To turn off the water supply to the toilet, rotate the shutoff valve clockwise. This valve is typically found on the wall behind the toilet or on the floor. Empty the water ...

2. Replace the Fill Valve If adjusting the float doesn’t do the trick, you may have a leaking fill valve might be beyond saving. Replacing it is straightforward but has a few basic steps.

The fill valve activates automatically after each flush and replenishes the toilet tank with water. Fill valves come in two different designs — ball-and-arm (also known as "ballcock valve") and ...

How to Repair a Running Toilet 1. Adjust the Float The float arm controls the water level in your tank. If it’s set too high, water will keep running into the overflow tube. Locate the float: It ...