How to Fix a Leaking Ball Valve

A misaligned or old toilet ball valve, also known as a tank ball, may be the culprit in a toilet that constantly runs. This ball-shaped seal is what keeps water from running into the toilet when it is lowered and allows water to flow for flushing when opened. There is more than one cause for a leaky tank ball, and it is best to check thoroughly before buying replacement parts.
1
Remove lid from the toilet tank. Examine the tank ball and determine if it is seating correctly. Examine the wire that is attached to the guide arm on the overflow pipe.
2
Turn water off using the valve behind the toilet. Then, straighten the wire if it is bent and adjust the placement on the guide arm if necessary. The wire should be placed on the guide arm where it is lifted high enough to open the valve during a flush and lowered low enough to seal when finished.
3
Turn water off at the valve behind the toilet. Remove old ball valve assembly from the guide arm on the overflow pipe.
4
Slide the lower lift wire through the upper lift wire and its guide. Attach the upper lift wire to the guide arm.
5
Thread the tank ball onto the lower lift wire. It should be snug, but not over-tightened.
6
Align the ball over the drain seat, making sure the wire is vertical. Use the flush lever a couple of times to be sure everything fits properly.
7
Turn the water back on. Check for leaks, and make any necessary adjustments. If none are needed, the toilet is ready for use.