Toto toilet flapper problem
I've put two new flappers into my Toto toilet (Carollton model) to deal with an intermittent leakage from the tank to the bowl and still the problem continues. A call to Toto's customer support suggested that there might be smutz on the rim of the tank's drain hole so I scrubbed it with a scouring pad but no improvement.
After flushing, the tank fills normally and then some time later, the tank is heard filling up a bit more in response to leakage from the tank into the bowl. This continues indefinitely. The flappers were pink flappers bought at a plumbing supply store for this model toilet and represented to me as Toto brand, although they were not in a labelled box or wrapper. The Toto rep verified that the pink flapper was the correct one for my Toto model.
Anyone have any suggestions?