How do I fix a leaky faucet?

Most leaky faucets are fixed by replacing a worn washer, O-ring, or cartridge. Turn off the water under the sink, take the handle apart, swap the bad part with a matching replacement, then reassemble and test.

Key takeaways

• Figure out the faucet type first: compression, ball, cartridge, or ceramic disk.
• Bring the old part to the hardware store so you get an exact match.
• Shut off both hot and cold valves before taking anything apart.
• If it still leaks after new parts, the valve seat or faucet body may be worn.

Deeper dive

If the drip comes from the spout, the usual culprit is an internal seal or cartridge. If water leaks around the handle, it’s often an O-ring or packing nut. Put a towel in the sink and plug the drain so screws don’t disappear. Take photos as you go so reassembly is easier. Use a wrench gently to avoid scratching finishes. I’m assuming this is a standard sink faucet, not a shower valve or pipe leak in the wall.