How to Repair a Leaky Faucet

Faucets are the hardest working components in your home, yet we rarely give them a second thought until they start keeping us awake with that rhythmic, persistent drip. A leaky sink is rarely a sign that you need a whole new fixture; it is usually just a cry for help from a degraded internal seal. By spending an hour with a wrench and a few inexpensive parts, you can stop the waste of water and eliminate that annoying sound for good. Working on plumbing requires a calm, methodical approach. The secret to a successful repair is organizing the parts as you pull them out so you know exactly how they go back together. When you finish, you will not only save on your utility bill but also gain the confidence that comes with mastering the hidden mechanics of your home.

1. Kill the Water First. Locate the shut-off valves under the sink and turn them clockwise until they stop. Open the faucet handles to bleed out any remaining water pressure in the lines.
2. Expose the Hidden Screw. Pry off the decorative cap on top of the handle using a flathead screwdriver. Use an Allen wrench or a screwdriver to loosen the set screw hidden underneath, then lift the handle off.
3. Extract the Cartridge. Use an adjustable wrench to unscrew the decorative nut or bonnet covering the cartridge. Pull the cartridge straight up and out of the faucet body.
4. Match the Exact Part. Check the O-rings and rubber washers for cracks or flattening. Take the entire cartridge to the hardware store to ensure you buy the exact matching replacement part.
5. Seat the New Cartridge. Slide the new cartridge into the faucet body, ensuring it seats correctly in the grooves. Tighten the bonnet nut back down firmly, but do not overtighten as this can crack the internal housing.
6. Verify No Leaks Remain. Replace the handle and tighten the set screw. Slowly turn your water valves back on under the sink and check for leaks while running the faucet to flush out any trapped air.