Review on 2-Pack Kohler-Compatible Canister Flush Valve Seal Replacements for Toilets - Equal to K-GP1059291 by Dexter Pullen

Didn't close properly on either of my two Kohler canister toilets. I fought them for about three weeks. I tried cleaning the surfaces and even emptied and scrubbed the entire tank to remove sand particles that had settled on the bottom over time. I ended up going to the local hardware store and looking for the best answer. I tried Corky's #435 filling. Two in a package for $6.58 and they were the same red as the original. When comparing red and yellow fillings, the red ones from Korka were slightly smaller in diameter than the yellow ones. And the good news is that they work. No more leaking in the toilet. With the yellow ones installed and the water shut off, both toilet tanks were completely drained in about 36-48 hours.