In this video I will show you step by step hot to replace this Kohler flush valve seal gasket. https://www.homedepot.com/p/Korky-Universal-3-in-Flush-Valve-Seal-Kit-435CM/202402377 https://www.homedepot.com/p/KOHLER-Seal-for-All-Single-Flush-Class-5-and-Class-6-Canister-Toilets-K-GP1059291/202524230