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Quick answer
To fix a leaky sink or clogged drain, turn off the water supply, disassemble the faucet or remove the drain stopper, and clean or replace worn parts like washers or aerators. Use a plunger or snake for clogs.
Confirm the symptom
- Water drips from the faucet even when turned off
- Slow draining water in the sink
- Gurgling sounds from the drain
- Faucet handle is stiff or hard to turn
- Water pooling around the base of the sink
Tools and prep
- Adjustable wrench
- Plumber's putty or sealant
- Replacement washers or O-rings
- Plunger or drain snake
- Bucket or towel to catch water
- Turn off water supply under sink
- Protect hands with gloves
Step-by-step troubleshooting
- Turn Off Water SupplyDo: Locate and turn the shut-off valves under the sink clockwise to stop water flow.Observe: Water stops dripping from the faucet.Means: Water supply is safely off.Next: Disassemble faucet
- Disassemble FaucetDo: Use an adjustable wrench to remove the faucet handle and access the internal parts.Observe: Internal components like washers and O-rings are visible.Means: Ready to inspect or replace parts.Next: Inspect parts for wear
- Inspect Parts for WearDo: Check for worn washers, damaged O-rings, or mineral buildup.Observe: Parts show signs of wear or clogging.Means: Identify the faulty component.Next: Replace or clean parts
- Replace or Clean PartsDo: Clean mineral deposits with vinegar or replace faulty washers and O-rings.Observe: Parts are clean or new components are installed.Means: Faucet should function properly.Next: Reassemble faucet
- Reassemble FaucetDo: Put the faucet back together, ensuring all parts are properly seated.Observe: Faucet is fully reassembled and secure.Means: Ready to test.Next: Test faucet
- Test FaucetDo: Turn the water supply back on and check for leaks.Observe: No water leaks and water flows smoothly.Means: Repair was successful.Next: Finish
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Worn Washer Over time, the rubber washer inside the faucet can deteriorate, causing leaks. | Common | Easy | Washer |
| Clogged Aerator Mineral deposits can block the aerator, reducing water flow and causing dripping. | Common | Easy | Aerator |
| Faulty O-Ring A damaged O-ring can lead to leaks around the base of the faucet. | Sometimes | Easy | O-ring |
| Clogged Drain Hair and soap scum can accumulate in the drain, causing slow drainage. | Common | Easy–Medium | Drain stopper |
| Corroded Valve Seat Mineral buildup or corrosion on the valve seat can prevent a proper seal. | Sometimes | Medium | Valve seat |
| Loose Handle A loose or worn handle can cause the faucet to leak or not shut off properly. | Rare | Easy | Handle screw |
Parts matching
Common parts needed for sink repairs include:
- Washer for faucet leaks
- O-ring for base or handle leaks
- Aerator for flow issues
- Drain stopper for clogs
- Valve seat for sealing issues
Always match the size and type of the part to your sink's model for a proper fit.
When to call a professional
- Leak persists after replacing all visible parts
- Water pressure remains low despite cleaning aerator
- Drain clog won't clear with a snake or plunger
- Faucet handle is broken beyond repair
- Mold or water damage is present around the sink area
FAQ
How do I know if my sink needs a new washer?
If your faucet leaks when off, the washer is likely worn and needs replacement.
Can I fix a clogged drain without a plunger?
Yes, use a drain snake or a mixture of baking soda and vinegar to clear minor clogs.
Why is my faucet still leaking after replacing the washer?
Check the valve seat for corrosion or ensure the new washer is properly installed.
What should I do if the sink drain is completely blocked?
Try using a drain snake to remove the blockage. If unsuccessful, call a plumber.
How often should I clean my sink aerator?
Clean the aerator every 3–6 months to prevent mineral buildup and maintain water flow.