The two most common faucet types are cartridge varieties and compression models with rubber washers. While washer-less cartridge models can leak eventually, it’s more likely that your dripping faucet is a compression model with a worn-out washer or O-ring. But with a few tools and a little elbow grease, you can take care of it in a flash.
Shut off the water supply before you begin. There’ll be two knobs underneath your sink, one for hot and one for cold. Simply turn them clockwise to shut off. Confirm that the water is cut off by turning both handles on the faucet. Next, close your sink drain, or cover it with a towel to prevent any parts from falling down the drain.
Use a flathead screwdriver to gently remove the decorative cap on top of each faucet handle. Next, you'll need a Phillips head screwdriver to remove the screw underneath the cap and then pull the handle off its stem. Once you’ve done this, take a photo of the assembly to reference for easy reassembly.
Next, use the adjustable wrench to remove the handle’s packing nut. Unscrew the stem, remove the brass screw in the base and replace the seat washer. Pull the stem from the packing nut and replace the O-ring. Use your photo to help reassemble everything in reverse order.
Turn the water back on and enjoy the silence!