How To Replace Valve Stem On Bathroom Sink

Replacing a valve stem on a bathroom sink is a common plumbing repair that can be completed in under an hour. The valve stem is a small, cylindrical-shaped part that controls the flow of water through the faucet. When the valve stem becomes worn or damaged, it can cause the faucet to drip or leak. Replacing the valve stem is a relatively simple repair that can be completed with a few basic tools.

Tools You'll Need:

Adjustable wrench
Flathead screwdriver
Phillips head screwdriver
Valve stem puller (optional)

Steps:

Turn off the water supply to the sink. There will be two shut-off valves underneath the sink, one for the hot water and one for the cold water. Turn both valves clockwise until they are completely closed.
Open the faucet to release any remaining water pressure.
Remove the faucet handle. Most faucet handles are held in place by a small screw. Use a screwdriver to remove the screw and then pull the handle straight up to remove it.
Remove the packing nut. The packing nut is a large, hexagonal-shaped nut that is located below the faucet handle. Use an adjustable wrench to loosen the packing nut and then remove it by hand.
Remove the valve stem. The valve stem is a small, cylindrical-shaped part that is located inside the packing nut. Use a valve stem puller (or a pair of pliers) to remove the valve stem.
Replace the valve stem. Insert the new valve stem into the packing nut and hand-tighten it. Use an adjustable wrench to tighten the packing nut until it is snug.
Reassemble the faucet. Replace the packing nut, faucet handle, and screw. Turn on the water supply to the sink and check for leaks.

Replacing a valve stem on a bathroom sink is a quick and easy repair that can be completed in under an hour. By following these steps, you can save yourself the cost of calling a plumber.