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 ...

The overflow tube is actually a part of the flush valve, and is attached to the flapper. The top of the pipe is open and sits just above the maximum water level, while its bottom connects to the ...

The fill valve should be seated slightly higher than the overflow tube to let gravity get the water into the tube. If it’s too long, you can trim it so it’s not extending into the pipe. 2.

On newer fill cup valves, this just means turning it counterclockwise. When it’s at the right height, put the refill tube back into the overflow tube and fasten your new valve in place.

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Since the overflow tube is rarely the cause of a running toilet, we won’t cover that repair here. If extra pressure on the flapper doesn’t stop the running noise, water is likely escaping ...

To its left is the flush lever, and you can also see the white refill tube draining into the overflow tube. John Kennedy Once your toilet flushes, the fill valve, well, starts filling it back up.

Any problems with the fill tube can keep the water from filling the tank after the toilet is flushed. If the fill tube unclips from the overflow tube, clip it back.

Ideally, the water level in the toilet tank should be 1 to 1.5 inches below the top of the overflow tube (also called an overflow pipe), an open-ended tube centrally located in the tank.

Water should remain at least 1 inch below the overflow tube. Check for cracks in the overflow tube. It’s possible that the ballcock is worn out and needs replacing.