I have 2 three year old Kohler Rosario Lite Toilets (K-3434)that have developed leaks in the past week. Flapper replacement hasn’t helped. The green fiber sealing gasket at the bottom of the tank seems to have become pourous and leaks no matter how much I try to squeeze it with the black tube the flapper valve pivots on. Can anyone tell me if the green gasket can be replaced with something that will be longer lasting and how do I get the fitting tight enought to stop the slow leak?
Thanks,
Carlo7