![]() Replacing the fill valve isn't as difficult as dealing with a faulty flush valve. If you find that the overflow tube is the right height for the toilet and the water level is set about an inch below the overflow tube, but water continues to flow into the overflow tube, the issue is likely the fill valve. If the water continues to run after the tank is full, then the tank-to-bowl gasket or the flapper might be improperly installed. While it's filling, take the time to check for any leaks at the base of the tank. Turn the water back on and allow the tank to fill up. Secure the tank-to-bowl bolts and reconnect the water supply to the toilet. ![]() Install the new flush valve in its place, then tighten the flush valve nut and replace the tank-to-bowl gasket before putting the tank back into position. Loosen the flush valve nut and remove the old flush valve assembly, setting it aside in a nearby sink or bucket. Remove the tank-to-bowl bolts and carefully lift the tank off the toilet to access the toilet-to-bowl gasket. ![]() You need to detach the toilet tank from the toilet bowl to remove the old flush valve assembly. Disconnect the water supply to the tank using a set of channel locks. Next, flush the toilet to drain the water and use a cloth, towel, or sponge to remove any remaining water from the tank. Start the replacement process by turning off the water to the toilet using the isolation valve on the water inlet line. Purchase a compatible flush valve assembly online or from a local home improvement store to ensure the new overflow tube will be tall enough for the toilet tank. However, if the water is continuously running but not flowing into the overflow tube, then the flush valve might be the problem.Īfter inspecting the overflow tube, the water level setting, the length of the flush valve chain, and the current state of the flapper, you might find that the problem is caused by the actual flush valve assembly. If the water continues running until it flows into the overflow tube, regardless of the float level, then the issue is probably caused by a faulty fill valve. Correct this issue by replacing the float. Keep in mind that if water is trapped inside the float, it will sit lower in the water, leaving the fill valve partially open. Continue to make quarter-turn adjustments until the float is set to the desired water level. To adjust the water level, locate the screw that attaches the float to the fill valve and use a screwdriver or a set of channel locks to turn the screw about a quarter-turn counterclockwise. Float rods and float balls typically extend out from the side of the fill valve, while a float cup is a small cylinder that is attached directly to the fill valve where it slides up and down with the water level. If the water level is set higher than this, it's recommended to lower the water level by adjusting the float rod, float cup, or float ball. Ideally, the water level should be set to about an inch below the top of the overflow tube.
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