How to Fix a Leaky Faucet
Most leaky faucets are caused by worn O-rings, cartridges, or valve seats. A single-handle faucet usually needs a new cartridge ($5–$20); a two-handle faucet usually needs new seat washers or O-rings ($2–$5). The repair takes 30–60 minutes with basic tools. If you prefer to hire out, expect to pay $125–$250 for a professional repair.
Cost Breakdown
| Service | Low | High | Notes |
|---|---|---|---|
| O-rings and washers (DIY) | $2 | $10 | Most common fix |
| Replacement cartridge (DIY) | $5 | $25 | Single-handle faucets |
| Cartridge puller tool | $8 | $15 | One-time purchase |
| Professional faucet repair | $125 | $250 | Labor + parts |
| New faucet + installation | $250 | $700 | Fixture + labor |
Fixing a Leaky Faucet — By Type
A dripping faucet wastes 5–10 gallons of water per day. That is up to 3,000 gallons per year — enough to add $20–$50 to your annual water bill. Most faucet leaks are easy to fix yourself.
Single-Handle Faucets (Cartridge or Ball)
Most modern kitchen and bathroom faucets are single-handle with a replaceable cartridge.
- Turn off the water supply valves under the sink
- Remove the handle (pry off the decorative cap, remove the screw underneath)
- Pull out the old cartridge (you may need a cartridge puller tool, $10)
- Take the old cartridge to the hardware store to match it
- Insert the new cartridge, reassemble, turn water back on
Two-Handle Faucets (Compression)
Older two-handle faucets use rubber seat washers that wear out over time.
- Turn off water supply
- Remove the handle and unscrew the packing nut
- Pull out the stem and replace the rubber washer at the bottom
- Also replace the O-ring on the stem
- Reassemble and test
Leaking From the Base
If water pools around the base of the faucet when it is running, the O-rings around the faucet body need replacement. Disassemble the faucet, replace all O-rings, and reassemble.
When to Replace Instead of Repair
- Faucet is more than 15–20 years old
- Replacement parts are discontinued
- The valve seat is damaged (requires reseating tool)
- You have already repaired it multiple times
A new faucet costs $100–$400 for the fixture plus $150–$300 for professional installation.
Related Questions
Can a dripping faucet increase my water bill?
Yes. A faucet dripping once per second wastes about 3,000 gallons per year. That can add $20–$50 to your annual water bill. A fast drip wastes even more. Fixing it immediately saves money and water.
Is a leaky faucet an emergency?
No, a dripping faucet is not an emergency. It is wasteful and annoying but not urgent. Schedule a repair at your convenience. However, if water is spraying or flowing uncontrollably, shut off the valve under the sink and call a plumber.
How long does a faucet cartridge last?
Most cartridges last 5–15 years depending on water quality and usage. Hard water areas may see shorter cartridge life due to mineral buildup. If you replace a cartridge and the faucet still drips, the valve seat may need attention.