Dripping Faucet Repair

Find the shut-off valves for both the hot and cold water lines under the sink. Turn the handles clockwise until they are fully closed. If you cannot locate or operate these valves, you may need to shut off the main water supply to the house.

With the water supply valves off, open the faucet handles to their fullest extent. Allow all the water to drain out from the faucet. This step is crucial to avoid a mess when you begin disassembling the faucet.

Observe the faucet's handles and body. Compression faucets usually have two handles that you screw down to turn off. Ball faucets have a single handle that moves over a rounded cap. Cartridge faucets often have a single lever that moves up and down and side to side. Ceramic disk faucets typically have a single lever and a wider, more modern body.

Pry off any decorative caps on the faucet handles using a flathead screwdriver or a putty knife. Then, use the appropriate screwdriver (Phillips or flathead) to remove the handle screw. Once the screw is removed, pull the handle straight up or off the faucet stem. You may need to gently rock it back and forth to loosen it.

Depending on the faucet type, you will need to remove specific components. For cartridge faucets, you might need to remove a retaining clip or nut before pulling out the cartridge. For ball faucets, unscrew the cap and lift out the ball and cam assembly. For compression faucets, unscrew the stem assembly.

Carefully inspect the cartridge, O-rings, valve seats, and any other rubber or plastic components for wear, damage, or mineral buildup. Often, a worn O-ring or a damaged cartridge is the cause of a drip. Replace any worn parts with new ones that are compatible with your faucet model. Ensure you have the correct replacement parts before disassembling.

Use a soft cloth and a mild cleaning agent like vinegar or a specialized lime remover to clean the inside of the faucet body and the parts you are reinstalling. Ensure all cleaning solution is rinsed away thoroughly.

Reinstall the faucet components in the reverse order of their removal. For cartridge faucets, insert the new cartridge, ensuring it's properly aligned, and secure it with the retaining clip or nut. For ball faucets, place the cam, packing, and ball, then screw on the cap. For compression faucets, reinstall the stem assembly. Lubricate O-rings with plumber's grease as you go.

Place the handle(s) back onto the stem(s) or cartridge. Reinsert and tighten the handle screw(s). Finally, press the decorative cap(s) back into place until they click or sit securely.

Slowly open the hot and cold water shut-off valves under the sink by turning them counter-clockwise. Turn the faucet on and off several times, checking carefully around the handle and spout for any drips or leaks. Ensure the water flows correctly and the initial drip has stopped.