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Water continues to drip from fill tube after the fill.

It drips or even runs slowly.  If I turn off water supply it continues to drip for minutes and then stops. The amount of water in bowl diminishes when I turn off the water. Why? If the water supply remains on, the toilet makes a sound as though it is topping off the fill every so often. Also how do I adjust the water level in the tank. I see the device but do not know how to work it to lower the level which is very near the top of the overflow tube.Thank you!

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Chances are the flapper is leaking. Thats causing the random refilling as the tank slowly loses water into the bowl.
Replace the flapper with only the best available at your supply house. the cheap ones tend to leak even when new. The good ones are less than 8 bucks most places.

If your fill valve has the float ball, there should be a screw right on top of the fill valve at the end of the rod holding the ball to adjust the water level.
Closckwise lowers the level.

Be carefull not to break the plastic ones. If the adjustment is all the way in or does not work, you will need to replace the fill valve.

You could also try bending the metal rod holding the ball, but only as a last resort.

Posted on Dec 04, 2008

  • thanks Danny. adjusting the screw worked as you suggested.


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I had same issue but with different solution... I noticed that the rubber fill tube was rubbing against the inside of the flapper assembly just enough to prevent flapper from fully sealing after flushing. I routed the rubber fill tube so that it doesn't touch or impede the flapper valve.

Posted on May 20, 2009

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As long as the chain on the flapper is slack after it flushes it will seal.
then put some weight on the flapper just to experiment to ensure a tight seal.
if you can see the drain elbow under the toilet in the basement with the ceiling exposing the drain that would be the guaranteed way to know for sure. I am assuming you have done that.
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either the fill valve is running and water is draining into the bowl via the overflow tube in the tank or the flapper is bad (or foreign matter) and it is allowing water to escape into the bowl slowly...causing the fill valve to run every few minutes or so. i just sent this to your email too. hope this helps but if you need anything else just text me here:)

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Is the drip comming from the small fill tube going into the overflow? If so you may need to raise it a little. The nost common leak is from the flapper or seal. On rare occasioms the flush valve itself has a defect that will cause it to leak. Take a close look at the problem and Im sure you will find it. I hope this helps.

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Check flapper out and adjust water level in tank to proper level. If you get level right and it still does drip it sounds like the flapper is not sealing correctly to shut off water.

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Your problem is not with the flapper, although it is a good idea the change that periodically also... The prolem you are having is with the fill valve. There is dirt in the fill valve which does two things. It blocks the water flow into the toilet and it also prevents the valve from shutting off completely. Depending on what kind of valve you have, you can easily clean it out. But most vlaves need to be replaced if you start to have this problem.
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Hi bpmorr1,

It may be that the fill tube has come disconnected . It runs from the top of the fill valve to the overflow. The overflow is the tube that runs up the middle of the tank. The fill tube runs from the top of the fill valve to the top of the overflow tube. Kohler has a little clip that can sometimes come undone and cause spraying.

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