A dripping kitchen faucet is more than an annoyance—it wastes water, raises utility bills, and can eventually damage your sink and fixtures.
The good news? Almost every dripping faucet can be fixed in under 10 minutes, and most repairs cost less than $15. A dripping kitchen faucet is typically caused by a worn cartridge, damaged O-rings, or loose internal parts.
This guide walks you through causes, fixes, and exact products that solve the problem.
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Quick Diagnosis: Why Your Faucet Is Dripping
| Drip Pattern | Most Likely Cause | Difficulty | Time | Recommended Product |
| Dripping from the spout | Worn O-rings, washer, or cartridge | Easy | 5–10 min | Cartridge Kit |
| Drip only on HOT side | Hot cartridge failure | Medium | 5 min | Hot Cartridge |
| Drip only on COLD side | Cold cartridge failure | Medium | 5 min | Cold Cartridge |
| Drip at the base | Worn O-ring | Easy | 5 min | O-Ring Kit |
| Drip when faucet is OFF | Cartridge failure or mineral buildup | Medium | 5–10 min | Replacement Cartridge |
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The 5 Most Common Causes of a Dripping Kitchen Faucet
1. Worn-out cartridge (60% of cases)
The internal cartridge regulates water flow. When it fails, water leaks even when the faucet is off.
2. Damaged O-rings (25%)
Found around the faucet’s base and stem—when worn, they cause steady dripping.
3. Hardened or cracked washers (10%)
Older compression faucets use washers that wear down.
4. Mineral scale inside cartridge (3%)
Hard water causes debris buildup, stopping seals from closing fully.
5. Loose faucet parts (2%)
A loose bonnet nut or handle assembly allows water to bypass internal seals.
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How to Fix a Dripping Kitchen Faucet (Step-by-Step Guide)
Choose the fix that matches your faucet type.
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Fix #1: Replace the Faucet Cartridge (Most Common & Proven Fix)
Time: 5–10 minutes
Difficulty: Easy–Medium
What you need:
- Screwdriver
- Allen wrench (sometimes)
- Replacement cartridge
Recommended: Universal Faucet Cartridge Replacement Kit.
Steps:
- Shut off the water under the sink.
- Remove faucet handle (cap → screw → handle off).
- Unscrew retaining clip or bonnet nut.
- Pull out the old cartridge.
- Insert the new cartridge (align tabs).
- Reassemble in reverse order.
Why this works:
A worn cartridge can’t fully block water flow, causing a constant drip.
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Fix #2: Replace Worn O-Rings (If Faucet Leaks at the Base)
Time: 5 minutes
Difficulty: Easy
Worn or cracked O-rings are a top cause of leaks around the faucet base.
Steps:
- Turn off water supply.
- Remove the handle and faucet body.
- Slide off old O-rings.
- Apply plumber’s grease to new O-rings.
- Install and reassemble.
Recommended: High-Durability Kitchen Faucet O-Ring Kit.
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Fix #3: Clean the Cartridge & Faucet Valve (Quick Temporary Fix)
Time: 3–5 minutes
Difficulty: Easy
If your area has hard water, buildup prevents the cartridge from sealing.
Steps:
- Remove the cartridge.
- Soak it for 10 minutes in vinegar.
- Scrub lightly with a soft brush.
- Reinstall.
Tip: This works for mild build-up but not for damaged seals.
Recommended: Hard Water Scale Remover.
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Fix #4: Replace the Washer (For Old Compression Faucets Only)
Time: 10 minutes
Difficulty: Medium
Older faucets drip when the rubber washer wears down.
Steps:
- Shut off water.
- Remove handle and valve stem.
- Replace rubber washer and seat washer.
- Reassemble.
Recommended: Compression Faucet Washer Assortment Pack.
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Fix #5: Tighten Loose Faucet Components
Time: 1 minute
Difficulty: Very Easy
A loose bonnet nut or stem can cause drips.
Fix:
Turn nut clockwise until snug (do not overtighten).
Tool: Adjustable basin wrench.
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Special Cases: What If Your Faucet Type Is Different?
✔ Pull-Down or Pull-Out Sprayer Faucet Dripping: the spray head diverter may be clogged. Clean or replace the diverter cartridge.
✔ Two-Handle Faucet Dripping: only the handle corresponding to the drip source (hot or cold) needs a new cartridge.
✔ Touch or Touchless Faucet Dripping: most leaks still come from:
- O-rings
- Cartridge
- Aerator debris
Follow the standard fixes.
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How to Know Which Cartridge You Need
Look for:
- Brand (Moen, Delta, Kohler, etc.)
- Model number under sink or on manual
- Cartridge shape (use a comparison chart)
Tip: Universal Cartridge Kit.
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How to Prevent Your Faucet From Dripping Again
Weekly
- Clean aerator
- Run hot water for 20 seconds to reduce buildup
Monthly
- Inspect for loose nuts/handles
- Wipe faucet with vinegar to prevent scale
Every 6–12 Months
- Replace O-rings
- Flush faucet lines
If you have hard water
Install a mini scale filter under your sink. Under-Sink Anti-Scale Filter
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Signs You Need to Call a Plumber
Call a pro if:
✔ Faucet leaks even with a new cartridge
✔ Water pressure is extremely low
✔ You see corrosion or green crust around fittings
✔ Water is leaking beneath the sink or into cabinets
✔ Your faucet is older than 10–12 years
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Recommended Tools & Products
| Product | Use Case |
| Universal Faucet Cartridge Kit | Fixes 60% of drips |
| O-Ring & Washer Set | Base leaks |
| Hard Water Descaler | Mineral buildup prevention |
| Basin Wrench | Tightening nuts in tight spaces |
| Under-Sink Filter | Hard water homes |
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Final Takeaway
A dripping kitchen faucet is almost always caused by a worn cartridge, damaged O-rings, or loose internal parts—and you can fix all of these in minutes.
Most homeowners solve the problem instantly with:
- A universal replacement cartridge + new O-rings
This combo delivers a permanent, leak-free fix.
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