Empty the bucket and place it underneath the water supply line.
Toilet lock nut clockwise.
Use a pair of pliers to just loosen the coupling nut.
The lock nut threads onto the fill valve inlet just above where the water supply hose or tube coupling attaches.
Then finish loosening the nut with your fingers.
Lock nuts are used to hold fixtures securely in place from below.
Use your pliers to loosen the nut under the tank.
Gently pull the nut down.
Remove the nut washer and lock nut.
I then would proceed counter clockwise with a second offset 6 pipe wrench and try to loosen the nut.
Using various methods to remove the nuts and the bolts when the toilet bolt won t tighten gets your project back on track.
Some nuts have wings that you can grasp with your fingers.
Position the new valve in place of the faulty one.
Tightly secure the lock nut washer and nut.
These are used in a toilet chiefly to secure the fill valve in the toilet tank.
Remove the fill valve.
The valve is connected to a rubber ball float.
Prepare the toilet turn the water supply shutoff valve clockwise to turn.
Locate the coupling nut on the underside of the toilet tank.
The end of the water supply line will come away from the connection.
When you unscrew the screw the pliers will hit against the toilet bowl and prevent the nut from turning and it will loosen.
Raise the pipeline from the overflow tube.
If the nuts don t have wings lock a pair of locking pliers around each one in turn.