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Thread: Replacement for toto gmax fill

  1. #1
    DIY Junior Member Realt0r's Avatar
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    Default Replacement for toto gmax fill

    I have a toto one piece 6lpf toilet that has a korky fill valve that isn't working properly. I ordered a new part and they sent me the tsu18a which is supposedly the replacement. I installed it and cannot get the water level to stay below the overflow pipe. I have adjusted it down as low as it can go but it still doesn't work. Is there any other adjustment except for the screw?

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Instructions are here

    http://www.terrylove.com/pdf/ms604_installation.pdf

    There doesn't seem to be a lot of adjustment other then with the screw at the top.
    Last edited by Terry; 11-07-2013 at 02:21 PM.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    Have you checked your water pressure? If it is exceptionally high, the valve may have trouble turning off. Anything over 80# should have a regulator on it. If you have one, it may be shot and need rebuild or replacement.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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