Same flapper issue as new2me
My Toto started having the leaking flapper immediately after installed by a professional plumber. I carefully inspected and realized that the flapper would frequently fall slightly off center and then the flapper would deform and allow leaking around the edge. I cut and sized the rigid plastic sleeve to use near the hinges to help the flapper seat more centrally. Now the flapper doesn't seat correctly 1 in 4 flushes and we have to walk back to the toilet to reflush. I contacted Toto and they simply sent a new identical flapper with exactly the same problem -- to soft and deformable. New2me was right, a rigid rubber is needed for this large 3 inch hole that allows the large flapper to collapse and deform. I will try the aftermarket product by Fluidmaster or has Toto really redesigned the flapper since this was purchased 1 1/2 years ago?
Korky fixed flapper problem!
I followed new2me's advice and went to Home Depot to buy the aftermarket flapper from Fluidmaster. I could not find that brand, but instead bought this Korky brand. Had same concept of adjustable buoyancy. It works great! No more collapsing into drain hole and persistent leaking. This problem had nothing to do with Chlorine, just bad "soft" design by Toto. They need to hire the Korky manufacturers or perhaps Fluidmaster for their OEM products!! Thank you new2me! Evan
3 Totos and 3 bad flappers
I am buying my third Korky 3-inch replacement flapper for my 3rd Toto toilet. The oldest flapper lasted 3.5 years. The rubber literally seems to have shrunk with the cold water this season and will no longer cover the 3 inch opening even when I adjust by hand. I have turned the water off until I can get a replacement flapper. This really is disappointing. I will look for a different brand toilet for my next purchase.