How to Adjust a Toilet Tank Flapper Flush Valve

  • 01 of 02

    Tips for Adjusting a Toilet Tank Flapper Flush Valve

    toilet tank flapper flush valve
    The toilet tank flapper flush valve is adjusted by use of a chain. Lavelle

    PROBLEM: Must Hold Lever Down Continuously to Flush Toilet

    One of the most common toilet problems not flushing right is having to hold the flush lever down continuously to flush the toilet. Fortunately this is an easy fix.

    The problem is caused by too much slack in the lifting chain which attaches the flush lever to the flapper ball. When the chain has too much slack, it cannot lift the flapper ball high enough to let it float on top of the water in the tank and it closes prematurely, thereby...MORE stopping the flush.


    To fix this problem, simply adjust the chain length so there is about 1/2 inch of slack. If the leftover chain hangs down too far and interferes with any part, trim the leftover chain length.

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  • 02 of 02

    Fixing a Leaking Toilet Tank Flush Valve

    flush valve repair kit
    The Fluidmaster flush valve repair kit is an easy way to stop flush valve leaks. Fluidmaster

    PROBLEM: Leaking Toilet Flapper Flush Valve

    This problem is annoying. Once you flush the toilet, everything seems fine. Then after a few minutes, you hear the sound of water running in the toilet tank!

    What's happening is that water has leaked out the bottom of the rubber flapper valve into the toilet and the water level in the tank has dropped.

    Once it drops below the "fill" level, the toilet ballcock fills the tank back up.


    To fix this problem I recommend this product from...MORE Fluidmaster® called the "Fluidmaster Universal Flush Valve Repair Kit." I've used this product and it's easy to install and works great.

    To see learn how it's installed, see the tutorial Repairing a Leaky Toilet Tank Flush Valve.