Combined with a float ball that rises and falls with the water level, the ball valve directs the flow of water into a toilet water tank. The ball valve in the water inlet tube opens when the ball float is lower than the desired water level and closes tightly, preventing water from flowing into the tank when the ball reaches the top of the line of water. If the toilet has a ball valve and runs non-stop, that could be the float or ball valve. Both are easy to fix and can be replaced in a couple of hours.
KOHLER K-4304-L-0 Highline(R) Toilet with Pressure Lite(R) Flushing Technology and Bedpan Lugs, White White
Instructions
1 Close the water in the shut-off valve. Look for it connected to the water pipe behind and just to the left of the back of the toilet. If there is no valve in the toilet, or if you can not tighten with your fingers, turn off the water supply to the house until repairs are complete.
2 Pull the chain to ensure that the water is completely free. Water should not come out again in the reserve tank once emptied. If the water does not continue to flow into the tank, you should use a shut-off valve all the water in the house instead of the toilet water trigger to remove and put the shut-off valve on your list of things to replace in the future.
3 Remove the water line from the bottom of the toilet with a wrench or adjustable pliers. Remove the lid of the toilet tank by lifting it and set it aside.
4 Disconnect the nuts securing the ball valve and the water supply pipe to the tank using pliers. Check all the inner washers of the valves for cracking, tearing or other reasons to replace them.
5 Place the new ball valve with the existing or new washers, and place it through the bottom of the reservoir. Wrap the valve threads with the plumber's tape and attach it to the water pipe.
6 Replace and tighten all nuts to secure the ball valve and water line in place. Secure the ball float arm of the valve.
7 Open the water supply, either in the water shut-off valve behind the toilet, or in the water shut-off valve for the entire house. Check the water level to make sure the tank is filled properly. Adjust the float if the water levels are too high or too low. Put the lid on the tank.