Quick answer
To fix a leaky sink spout, turn off the water supply, disassemble the spout, and replace worn washers or O-rings. For low water flow, clean the aerator and check for clogs.
Confirm the symptom
- Water dripping from the spout after turning off the faucet
- Low water pressure from the sink
- Spout is loose or wobbly
- Water leaks around the base of the spout
- Unusual noises like squeaking or whistling when using the spout
Tools and prep
- Adjustable wrench
- Screwdrivers (flathead and Phillips)
- Plumber’s putty or silicone sealant
- Replacement washers or O-rings
- Aerator cleaning kit
- Bucket or towel to catch water
- Turn off water supply before starting
Step-by-step troubleshooting
- Turn Off Water SupplyDo: Locate and turn off the shut-off valves under the sink.Observe: Water stops flowing from the spout.Means: Water supply is safely cut off.Next: Disassemble the spout
- Disassemble the SpoutDo: Use a screwdriver to remove the handle and spout assembly.Observe: Internal components are exposed.Means: Access to faulty parts is gained.Next: Inspect for damage
- Inspect for DamageDo: Check for worn washers, O-rings, or mineral buildup.Observe: Visible wear or blockages in the components.Means: Identify the cause of the issue.Next: Replace or clean parts
- Replace or Clean PartsDo: Replace damaged washers or O-rings. Clean the aerator with a brush and vinegar.Observe: Components are clean or replaced with new ones.Means: Potential leaks or clogs are resolved.Next: Reassemble the spout
- Reassemble the SpoutDo: Put the spout back together and tighten all connections.Observe: Spout is securely reassembled.Means: Ready for testing.Next: Test the spout
- Test the SpoutDo: Turn the water supply back on and check for leaks or proper flow.Observe: Water flows without leaks and at normal pressure.Means: Issue is resolved.Next: Finish
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Worn Washers or O-Rings Over time, rubber seals can degrade, causing leaks. | Common | Easy | Washer or O-ring kit |
| Clogged Aerator Mineral deposits can restrict water flow. | Common | Easy | Aerator cleaning kit |
| Loose or Damaged Spout Vibrations or corrosion can loosen the spout connection. | Sometimes | Easy–Medium | Spout or mounting hardware |
| Faulty Valve Seat A damaged valve seat can prevent the spout from sealing properly. | Sometimes | Medium | Valve seat repair kit |
| Corrosion or Rust Old metal components can corrode, leading to leaks. | Rare | Medium | New spout or pipe |
| High Water Pressure Excessive pressure can strain the spout and cause leaks. | Rare | Hard | Pressure regulator |
Parts matching
Choose the right parts based on your sink and spout type:
- Washer or O-ring kit for rubber seal replacement
- Aerator cleaning kit for mineral buildup removal
- Spout mounting hardware for loose connections
- Valve seat repair kit for faulty valve seats
- New spout for severe corrosion or damage
Match the finish (chrome, brass, etc.) of your current spout for a cohesive look.
When to call a professional
- Persistent leaks after replacing washers or O-rings
- Severe corrosion or rust that requires pipe replacement
- High water pressure issues needing a pressure regulator
- Complex valve or cartridge problems beyond basic repair
FAQ
How do I know if my spout needs a new washer or O-ring?
If water leaks from the spout after turning it off, worn washers or O-rings are likely the cause. Inspect them for cracks or wear and replace as needed.
Can I clean a clogged aerator without special tools?
Yes, soak the aerator in vinegar to dissolve mineral deposits, then brush it with a toothbrush to remove debris.
Why is my spout still leaking after replacing the washer?
Check if the valve seat is damaged or if the spout is loose. A faulty valve seat or unstable spout can also cause leaks.
How often should I replace my sink spout?
Replace the spout every 5–10 years or when there is significant corrosion, leaks, or damage that can’t be repaired.