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Thread: Kohler Cimmaron losing water in tank. Help!!

  1. #1

    Default Kohler Cimmaron losing water in tank. Help!!

    Ok i have a problem and really need help. I have a Kohler Cimmaron that i have had for a year or so now. Up until a couple of weeks ago it worked fine with no problems. Now somehow water is leaving the tank and the fill valve keeps coming on to refill the tank. I shut the water supply off and you can definately see the water level drop. There is no water leakingfrom the water supply/ fill valve connection. There is no water leaking from the tank/bowl. There is no sign of leaking at the base of the toilet either. I ordered and installed a new Kohler flush valve withou any change. It can't possibly be the fill valve can it (like the float)? I'm no expert on toilets but have fixed and installed a few in my time but never faced this situation. I mean there are only so many ways for the water to leave the tank and with no signs of leakage anywhere i am stumped. Can anyone offer any advice?

  2. #2
    In the Trades Gary Swart's Avatar
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    It's the flapper. It is either worn out or has something preventing it from sealing. Try cleaning the flapper itself and the seat where it drops.

  3. #3

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    Quote Originally Posted by Gary Swart View Post
    It's the flapper. It is either worn out or has something preventing it from sealing. Try cleaning the flapper itself and the seat where it drops.
    Gary i did that first before buying the replacement valve. I read the instructions for troubleshooting the problem. I cleaned around the seal, adjusted chain to make sure it was properly seated after flushing and tried adjusting the fill valve all with no luck. It also not a traditional "flapper" but a cannister style. The flush valve on there right now is brand new and i examined it carefully before installing.

  4. #4
    DIY Senior Member Runs with bison's Avatar
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    Drop a bit of dye into the top of the tank and watch where it goes. It should head toward your leak.

  5. #5

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    Quote Originally Posted by Runs with bison View Post
    Drop a bit of dye into the top of the tank and watch where it goes. It should head toward your leak.
    Ok so this is what i have done in my investigation of the problem. I flushed the toilet as normal and by that i mean with the tube sticking down the over flow. In about five minutes the water level drops enough for the fill valve to operate and refill the tank. I did this a few times to verify what it was doing. I then put dye in the tank and flushed. The result was the dye showing up in the bowl. Please remember that this is the same result as the old flush valve. So i decided to try something else. I took the fill tube out of the over flow ad just let it hang in the tank after filling. When i did this and waited for awhile i saw no leak even after hours there was no drop in the water level in the tank. So what do i do now?

  6. #6
    Journeyman/Inspector Inspektor Ludwig's Avatar
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    You're supposed to let the dye sit in the tank without flushing. Then if you see dye in the toilet (without flushing) you'll know it's the flapper.

  7. #7
    Master Plumber Dunbar Plumbing's Avatar
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    Replace the seal at the bottom of that tower. That'll fix the problem.
    Read what the end of this sentence means.

  8. #8
    Forum Admin, Expert Plumber Terry's Avatar
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    The tube down the overflow will siphon the tank down to that level.

    Keep the fill tube above the overflow tube.

  9. #9

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    Quote Originally Posted by Inspektor Ludwig View Post
    You're supposed to let the dye sit in the tank without flushing. Then if you see dye in the toilet (without flushing) you'll know it's the flapper.
    I did let it sit without flushing.

  10. #10

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    Quote Originally Posted by Dunbar Plumbing View Post
    Replace the seal at the bottom of that tower. That'll fix the problem.
    I replaced everythin from tank to bowl gasket, to locknut, seals and whole cannister assembly. It all came as a kit. No old parts were reused.

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