Quote:
Originally Posted by kansasr
You're looking for the Kohler Seal for all Single Flush Class 5 and Class 6 Canister Toilets. About $7 at Home Depot.
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^^^^^^^ THIS!! ONLY use the yellow Kohler replacement gasket!
The original red gasket (and the generic red replacement gaskets) are made of inferior materials and will fail quickly. The yellow Kohler replacement is an improved material and will last much longer ..... well worth the few dollars additional cost.
Also ..... if one has failed the other(s) are not far behind. Replace all of the red gaskets.