The seat disk predates the Korky flapper, so your toilet must be really old if it has a flush valve that uses one. It’s a flat rubber disk that fits over the valve opening, held in place by ...

TOILET TANK FLAPPER QUICKLY FIXES running and leaking toilets and eliminate costly water waste. KORKY INVENTED THE TOILET TANK FLAPPER and is still the preferred brand by plumbers for superior ...

Because Korky valves are universal replacements for American Standard, Kohler, Delta, and more, many toilets have them. What ...