Q:I'd like to understand just how water comes into the toilet tank ... unscrewing the nut attaching the fill valve, removing the old valve and replacing it with the new one.

Flush the toilet to empty as much water as possible, then use a sponge or towel to soak up the remainder. Remove the old fill valve: Unscrew the water supply line and loosen the lock nut holding ...

Hold a small bucket to catch water as it leaks out from disconnecting the toilet tank supply line. Remove the fill valve lock nut Remove the lock nut from the shank of the fill valve right above ...