Step 3 · Disconnect Water Supply Line

This is the step people usually slow down on. Go finger-tight first, then a quarter turn. No rush — replay the clip whenever it helps.

Place a small towel or bucket directly below the water supply line connection at the bottom of the toilet tank to catch any drips. Using an adjustable wrench or channel-lock pliers, grip the coupling nut on the supply line and turn it counter-clockwise to loosen it. Once loose, you should be able to unscrew it the rest of the way by hand.