I have a toilet that tops itself up full about once every 5 minutes, I
think its leaking out from the 2" flap that gets opened when you pull
the flush lever.
First of all, that is that part called?
Second, are they all standard, and are they a PITA to replace?
Also, there is a vertical pipe inside the tank, and a thin tub
pointing into its top end. Is that a noise reducing mechansm, or an