Locate the coupling nut on the underside of the toilet tank.
Toilet lock nut clockwise.
Using various methods to remove the nuts and the bolts when the toilet bolt won t tighten gets your project back on track.
Raise the pipeline from the overflow tube.
Position the new valve in place of the faulty one.
If the nuts don t have wings lock a pair of locking pliers around each one in turn.
Tightly secure the lock nut washer and nut.
Use your pliers to loosen the nut under the tank.
Empty the bucket and place it underneath the water supply line.
Remove the fill valve.
Step 3 replace the valve.
Some nuts have wings that you can grasp with your fingers.
Remove the nut washer and lock nut.
The valve is connected to a rubber ball float.
Prepare the toilet turn the water supply shutoff valve clockwise to turn.
Then finish loosening the nut with your fingers.
Lock nuts are used to hold fixtures securely in place from below.
The lock nut threads onto the fill valve inlet just above where the water supply hose or tube coupling attaches.
When you unscrew the screw the pliers will hit against the toilet bowl and prevent the nut from turning and it will loosen.
Use a pair of pliers to just loosen the coupling nut.
To be honest before i grabbed the hack saw i would always set up a straight 6 pipe wrench inside the toilet tank and position it at the base of the fill valve with the handle up against the toilet tank.
I then would proceed counter clockwise with a second offset 6 pipe wrench and try to loosen the nut.
These are used in a toilet chiefly to secure the fill valve in the toilet tank.