How to Fix a Leaking Faucet
By the Super Simple Digital Tools Team · Updated June 2026 · Medium · 30 minutes
A constantly dripping faucet can waste litres of water a day and is almost always caused by a worn rubber washer or O-ring. Replacing it is a beginner-friendly repair that costs only a few cents in parts.
⚠ Safety: Always shut off the supply before opening a faucet, or you'll flood the cabinet.
Steps
- Shut off the water. Turn off the supply valves under the sink (turn clockwise). Open the tap to release pressure and drain the line.
- Plug the drain. Put the stopper in or lay a cloth over the drain so small screws can't fall down it.
- Remove the handle. Pry off the decorative cap, undo the screw underneath, and lift the handle off to expose the valve stem.
- Replace the washer or cartridge. Unscrew the packing nut, pull out the stem, and swap the worn rubber washer or O-ring for an identical new one. Take the old part to the hardware store to match it.
- Reassemble and test. Put everything back in reverse order, turn the water back on slowly, and check for leaks.
Tips
- Take a photo as you disassemble so reassembly is easy.
- Smear a little plumber's grease on the new washer for a better seal.
- If the leak is around the base, it's usually the O-ring rather than the washer.