How to Replace a Bathroom Sink Valve

What You'll Need
Adjustable wrench
Plastic gloves
New faucet valve

Among bathroom sink repairs, replacing the sink valve is a common occurrence. This essentially because the bathroom sink fittings are prone to developing internal wear and tear due to the high degree of daily usage. This is best exemplified by bathroom fittings like faucets that are prone to neglectful handling. Like most bathroom fixtures, the faucets are manufactured with durability as the main consideration. However, they are prone to developing loosened or cracked valves over a period of sustained usage.

Bathroom Sink Valve Replacement Basics

The valves in most bathroom sink faucets have a similar construction in that they are all attached to the faucet handle. Every time the faucet handle is turned, the valve is rotated to either stop the flow of water or allow a stream of water through the spout. It is generally recommended that bathroom sink valves shouldn’t be repaired since repaired valves are not likely to hold up for a very long period of time. It is always better to replace them. Replacing a bathroom sink valve is rather easy.

Step 1—Getting Started: Basic Precautions

Start by wearing plastic gloves. Locate the main water supply valve that is usually located under the skin. Shut off the water supply. Move the faucet handle to ensure that the last drops of water are also drained out. If you cannot locate the main valve around the skin, turn off the main water-supply. Plug the sink hole using a sink stopper or a wet towel.

Step 2—Disassembling Bathroom Sink Faucet

Remove the cap of the faucet using a screwdriver. You are most likely to find a main locking nut below the cap. Remove this nut with a wrench. This will help you to unfasten the handle of the faucet. The locking nut can be corroded and very hard to turn. You might need to tap it lightly with the screwdriver and apply some petroleum jelly to loosen it. Place aside the locking nut and the faucet cap.

Proceed downwards from the locking nut and disengage the cartridge stem or the main stem. It is better to pull out the stem with a pair of pliers rather than trying to push it out that can harm the body of the faucet. Some bathroom faucets have a stem locking nut that can be easily removed using the screwdriver. After removing the stem, repeatedly turn the body (base of the faucet) to unfasten it. This gives access to the underlying valve.

Step 3—Removing Old Bathroom Sink Valve

The valve is secured with a valve nut. You can unfasten it using an adjustable wrench. However, the valve stem and valve seat are tightly packed, and the internal corrosion can make it very hard to dislodge them. You might need to hammer them lightly to knock off the corroded debris. The valve stem nut is also called the packing nut. The valve stem loses its rigidity once the main nut is removed, and you can lift it out of the valve socket.

Step 4—Installing a New Bathroom Sink Valve

Installing the new valve is rather easy since you can just insert the valve socket into the new valve body. To tighten the new valve, begin by applying some physical force. Turn it repeatedly to push it deeper into the valve socket. Now, tighten it using a wrench. Re-assemble the bathroom sink faucet, starting from the basal body of the faucet, proceeding upwards.