We have identical 3.5 gallon Kohler toilets (same model #s) that we purchased twenty years ago. Both have Fluidmaster 400A fill valves that are set as low as the screw mechanism allows. I've noticed (after complaints from my wife) that the water level in one toilet is 3/4" higher than it is in the other toilet. No adjustment I do will lower the water level in the higher one. Can anyone explain why?
On another thread in this forum, someone suggests switching to a padded seat. I suppose that would work, but I don't understand why we have this difference.