1Shut off the water
Close the hot and cold valves under the sink, then open the faucet to release pressure. If a valve won't close fully, shut off the main water supply instead. Let any hot water cool before taking the faucet apart.
FREE REPAIR GUIDE
How to Fix a Leaky or Dripping Faucet
Stop a dripping faucet by replacing the cartridge or washer. Step-by-step for single-handle and two-handle faucets.
DIFFICULTYMedium
ESTIMATED TIME30–60 min
TOOLSScrewdriver, Allen key, adjustable wrench
POTENTIAL SAVINGS$100–200Labour estimate · varies
Know what you’re replacing.
A drip almost always means a worn cartridge, washer or O-ring inside the handle. The trick is identifying your faucet type and bringing the old part to the store so the new one matches.
What you’ll need.
Faucet cartridgeMatch your brand and model — bring the old one · ~$15–40
View on Amazon →
Faucet repair kit (washers & O-rings)For older two-handle faucets · ~$8
View on Amazon →Plumber's grease~$6
View on Amazon →As an Amazon Associate, RepairAI may earn from qualifying purchases. Check that parts fit your exact model before buying.
A little preparation first.
- Turn off both shutoff valves under the sink (clockwise) and open the faucet to drain it.
- Plug the sink drain so small screws can't fall in.
- Take photos as you take it apart.
One step at a time.
2Remove the handle
Pop off the decorative cap and remove the handle screw (Phillips or Allen), then lift the handle off.
3Take out the cartridge
Unscrew the retaining nut or clip and pull the cartridge straight up. Note which way it faced.
4Fit the new cartridge
Grease the O-rings lightly, insert the new cartridge the same way, and refit the nut or clip.
5Reassemble and test
Refit the handle, open the shutoff valves slowly, run hot and cold, and check for drips at the spout and leaks under the sink.
Log in 
Troubleshooting
Hot and cold are reversedRotate the cartridge 180° and reinstall.Leak from the base, not the spoutReplace the O-rings on the spout or body.Still dripsThe valve seat may be worn; replace the seat or the faucet.
FAQ
Do I need a plumber?Usually not for a drip. Corroded or seized parts may need one.Which cartridge fits?Take the old cartridge to the store or check the faucet brand's parts lookup.
General guidance only. Turn off power, water or gas before you work and follow the manufacturer’s instructions; if unsure, call a qualified professional.