How to Fix a Leaky Kitchen Faucet

Faucets are the hardest-working fixtures in your home, and a persistent drip is more than just an annoyance—it is a slow, steady drain on your water bill. When the steady *drip-drip-drip* starts, it is usually a sign that an internal rubber seal has hardened or a cartridge has reached the end of its mechanical life. Ignoring it only leads to mineral buildup, which makes the eventual repair much harder than it needs to be. Fixing a faucet is a classic rite of passage for any homeowner. The process is straightforward, provided you stay organized and protect your workspace. By the time you are finished, you will have a silent, smooth-operating handle and the confidence to handle the next plumbing hiccup that comes your way. Let's get that sink sealed back up.

1. Stop the Flow First. Locate the hot and cold supply valves underneath your sink. Turn both knobs clockwise until they are completely closed, then open the faucet handle to drain the remaining water in the lines.
2. Free the Handle. Look for a small set screw on the handle, usually hidden under a decorative cap or a small colored dot. Use a hex key or screwdriver to loosen the screw and lift the handle off the stem.
3. Loosen the Bonnet. Use an adjustable wrench to carefully loosen the packing nut or bonnet nut that holds the cartridge in place. Turn it counter-clockwise, ensuring you do not twist the actual pipe assembly.
4. Pull Out the Cartridge. Pull the cartridge or stem straight up and out of the faucet body. If it is stubborn, use a pair of pliers to gently wiggle it free, taking care not to crush the plastic components.
5. Install the New Cartridge. Take the old cartridge to the hardware store to ensure an exact match for the replacement. Install the new cartridge, seating it firmly into the grooves inside the faucet body.
6. Test for Leaks. Tighten the bonnet nut, replace the handle, and secure the set screw. Slowly turn your supply valves back on and check for leaks while running the water for one minute.