Out of the blue one of my home commodes (2 years old) started trickling water past the flapper into the bowl.
I replaced flapper with new and no change.
Upon investigation have found the flapper is not seating into center of tank drain. It is off ever so slightly. I can manually center the flapper and leak stops.
I don't understand why flapper mysteriously no longer closes on center with tank drain? Flapper attachment on vent pipe hasn't / can't move.