The end of the water supply line will come away from the connection.
Toilet lock nut clockwise.
Use your pliers to loosen the nut under the tank.
While turning these stabilize the bolt from above with a screwdriver.
Position the new valve in place of the faulty one.
Locate the coupling nut on the underside of the toilet tank.
Using various methods to remove the nuts and the bolts when the toilet bolt won t tighten gets your project back on track.
Step 3 replace the valve.
Remove the fill valve.
If the nuts don t have wings lock a pair of locking pliers around each one in turn.
When you unscrew the screw the pliers will hit against the toilet bowl and prevent the nut from turning and it will loosen.
Empty the bucket and place it underneath the water supply line.
Use a pair of pliers to just loosen the coupling nut.
Raise the pipeline from the overflow tube.
Some nuts have wings that you can grasp with your fingers.
Prepare the toilet turn the water supply shutoff valve clockwise to turn.
Lock nuts are used to hold fixtures securely in place from below.
Gently pull the nut down.
The lock nut threads onto the fill valve inlet just above where the water supply hose or tube coupling attaches.
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.
Then finish loosening the nut with your fingers.
Remove the nut washer and lock nut.