Position the new valve in place of the faulty one.
Toilet lock nut clockwise.
When you unscrew the screw the pliers will hit against the toilet bowl and prevent the nut from turning and it will loosen.
The valve is connected to a rubber ball float.
Locate the coupling nut on the underside of the toilet tank.
These are used in a toilet chiefly to secure the fill valve in 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.
Remove the fill valve.
I then would proceed counter clockwise with a second offset 6 pipe wrench and try to loosen the nut.
Gently pull the nut down.
Some nuts have wings that you can grasp with your fingers.
Then finish loosening the nut with your fingers.
The lock nut threads onto the fill valve inlet just above where the water supply hose or tube coupling attaches.
Prepare the toilet turn the water supply shutoff valve clockwise to turn.
Empty the bucket and place it underneath the water supply line.
The end of the water supply line will come away from the connection.
Raise the pipeline from the overflow tube.
While turning these stabilize the bolt from above with a screwdriver.
Step 3 replace the valve.
Use your pliers to loosen the nut under the tank.
Tightly secure the lock nut washer and nut.
Lock nuts are used to hold fixtures securely in place from below.
Use a pair of pliers to just loosen the coupling nut.