Quick answer
Turn off the water supply, check for loose connections or cracks, and replace the hose if needed. Use a wrench to tighten fittings and inspect for wear.
Confirm the symptom
- Visible water dripping from the hose
- Puddles under the sink
- Increased water bill with no explanation
- Dripping sound when water is off
- Rust or corrosion on the hose fittings
Tools and prep
- Adjustable wrench or basin wrench
- Replacement sink hose (if needed)
- Plumber's tape
- Bucket or towel to catch water
- Turn off water supply to the sink
- Protective gloves and safety glasses
Step-by-step troubleshooting
- Shut Off Water SupplyDo: Locate and turn off the shut-off valves under the sink.Observe: Water stops flowing from the faucet.Means: Water supply is safely cut off.Next: Inspect the hose for visible damage
- Inspect the HoseDo: Check the hose for cracks, kinks, or wear.Observe: Visible damage or leaks along the hose.Means: Hose may need replacement.Next: Tighten or replace the hose
- Tighten ConnectionsDo: Use a wrench to gently tighten the connections at both ends of the hose.Observe: Leak stops or reduces significantly.Means: Loose fittings were the cause.Next: Test for leaks
- Test for LeaksDo: Turn the water supply back on and check for leaks.Observe: No water leaks from the hose or connections.Means: Issue is resolved.Next: Finish
- Replace the HoseDo: Disconnect the old hose and install the new one, applying plumber's tape to the threads.Observe: New hose is securely connected with no leaks.Means: Damaged hose was the cause.Next: Test for leaks
- Dry and ReassembleDo: Wipe down the area and reattach any components you removed.Observe: Area is dry and components are secure.Means: Repair is complete.Next: Finish
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Loose connections Fittings can loosen over time due to vibration or regular use. | Common | Easy | Plumber's tape |
| Cracked or worn hose Aging or exposure to heat can cause the hose to crack or develop pinholes. | Common | Easy | Replacement sink hose |
| Corroded fittings Mineral buildup or rust can prevent a tight seal. | Sometimes | Easy–Medium | New fittings or replacement hose |
| Improper installation Hose not installed correctly can lead to leaks. | Sometimes | Easy | Plumber's tape |
| High water pressure Excessive pressure can stress the hose and connections. | Rare | Medium | Pressure regulator |
| Damaged O-rings Worn or missing O-rings can cause leaks at connections. | Rare | Easy | Replacement O-rings |
Parts matching
Common parts needed for fixing a leaking hose under the sink include:
- Replacement sink hose
- Plumber's tape
- O-rings
- Fittings or connectors
- Water shut-off valve repair kit
Measure the existing hose to ensure the replacement is the correct size and type (hot or cold water).
When to call a professional
- Leak persists after replacing the hose and tightening connections
- You notice water damage to the cabinet or wall
- You're unable to locate the source of the leak
- You suspect a problem with the water pressure or main supply line
- You're uncomfortable working with plumbing under the sink
FAQ
How often should I replace my sink hose?
It's recommended to replace rubber hoses every 5 years, even if they show no signs of wear, to prevent unexpected leaks.
Can I use regular tape instead of plumber's tape?
No, plumber's tape (Teflon tape) is specifically designed for sealing pipe threads and should be used for best results.
Why is my new hose still leaking after installation?
Ensure the threads are clean, apply plumber's tape correctly, and tighten the connections without over-tightening.
Is it normal for the hose to feel warm?
Yes, if it's a hot water hose, it's normal for it to feel warm. However, excessive heat can accelerate wear, so ensure it's not near heat sources.
Can I fix a leaking hose without turning off the water?
No, always turn off the water supply to prevent water damage and ensure safety while making repairs.