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Generally the double flush will happen after the flapper or other internal components of the tank get replaced, it is caused by the installation of an incorrect flapper, even though some flappers do not have it noted on the packaging, there are usually 2 types of flappers, one for 1.6 gallon flush toilets and one for 3.5 gallon flush toilets. Installing the wrong flapper will cause a double flush because the flapper does not close at the correct time during the flush cycle. To correct this you will need to get a correct flapper. There is a company that makes an adjustable flapper that works on either type, it is red and has a plastic frame with a red rubber flapper that can be rotated in the fame to adjust it to your specific toilet, if you aren't sure which one you need the adjustable one may be your best option.

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14y ago
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13y ago

Your water level is set to high in the tank or you have the wrong flapper installed.

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14y ago

not enough water is getting in the holding tank to flush it down. Float valve may need adjusted

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Q: Why does my toilet flush twice?
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