Replace the Kohler Canister Flush Valve Seal - Kohler Toilet Running - YouTube
2" Universal Toilet Flush Valve Repair Kit with Adjustable Toilet Flapper | Flapper & Seal Replacements, Flush Valve Replacements | Korky Toilet Parts
How to Fix a Toilet - Flush Valve Replacement - Part 1 of 2 - YouTube
American Standard & Kohler 3" Toilet Flush Valve Seal Kit | Flapper & Seal Replacements, Flush Valve Replacements | Korky Toilet Parts
Fluidmaster 4-in Blue Flush Valve Seal for American Standard Champion 4, Eljer Titan 4 in the Residential Toilet Flush Valves & Repair Parts department at Lowes.com
Mansfield Flush Valve Seal Replacement 210 or 211. Fix Running Toilet & Stop Wasting Water. - YouTube
Toilet Flush Valve Seal Replacement - iFixit Repair Guide