How to Replace the Angle Valve for a Toilet
- 1). Turn off the main water supply to the home. The main shutoff valve is near your water meter. Turn on a faucet to verify that the water is off.
- 2). Flush the toilet and hold down the toilet lever handle to allow as much water as possible to drain from the tank. Remove the toilet tank lid and soak up the remaining water in the tank with towels.
- 3). Disconnect the tank water supply hose from the top of the angle valve. Turn the connector counterclockwise with a pair of channel-lock pliers.
- 4). Grasp the pipe coming from the wall with a pair of pliers between the wall and the retaining nut securing the angle valve. You just want to hold this pipe still but do not crush the pipe with the pliers. Turn the retaining nut clockwise to loosen the nut from the angle valve. You'll turn the nut clockwise because you will be looking at the nut in reverse. The nut threads to the valve, not the pipe.
- 5). Release the pliers from the house water pipe when the nut is loose enough to turn by hand. Finish unthreading the nut by hand and remove the angle valve. Pull the small, angled compression ring off the end of the house pipe with a pair of pliers and slide the retaining nut off the house pipe.
- 6). Place the new angle valve retaining nut over the house pipe with the threads of the nut facing away from the wall. Push the compression ring over the end of the house pipe with the angle portion pointing away from the wall.
- 7). Wrap plumber's tape around the two sets of threads on the angle valve. Position the angle valve to the end of the house pipe and thread the retaining nut onto the valve until hand-tight. To thread the retaining nut, turn the nut counterclockwise as you will be looking at the nut in reverse. Tighten the nut another 1/2 turn with a wrench.
- 8). Thread the toilet tank water supply line to the angle valve until hand-tight. Turn the fitting another 1/2 turn with a wrench or pair of channel-lock pliers. Turn the valve handle clockwise to shut off the valve to prevent water going into the toilet tank.
- 9). Turn on the house main water supply. Go back to the toilet angle valve and slowly turn the valve handle counterclockwise to supply water to the tank. Inspect the two connections on the valve for leaks. Tighten if necessary.
Source...