How to repair a leaky kitchen faucet depends on the type of faucet and the source of the drip. A dripping faucet can waste over 3,000 gallons of water per year, according to the EPA WaterSense program. In this guide, we’ll walk you through the most common repairs for compression, cartridge, ball-type, and ceramic-disk faucets so you can fix that leak and lower your water bill.
Before You Start: Identify Your Faucet Type
Kitchen faucets fall into four main categories. Knowing which one you have is essential before buying replacement parts. Check the manufacturer’s label under the sink or look up the model online. The International Association of Plumbing and Mechanical Officials (IAPMO) provides standards that help identify common faucet designs.
- Compression faucet: Two handles (hot and cold); uses rubber washers; most common in older homes.
- Cartridge faucet: Single or double handle; uses a replaceable cartridge; found in many modern kitchens.
- Ball-type faucet: Single handle with a ball-shaped valve; typical in some brands like Delta.
- Ceramic-disk faucet: Single handle; uses two ceramic disks for drip-free performance; very durable.
Tools and Materials You’ll Need
Before diving in, gather these supplies. Prices vary by region, but a typical DIY repair kit costs between $10 and $30 at a local hardware store.
| Tool / Material | Purpose |
|---|---|
| Adjustable wrench | Loosening nuts and fittings |
| Phillips and flathead screwdrivers | Removing handle screws and trim |
| Allen wrench (hex key) | Some handle set screws |
| Replacement cartridge or washer kit | Specific to your faucet model |
| Plumber’s grease | Lubricating O-rings and seals |
| Bucket and towels | Catching water and drying the area |
Step-by-Step Repair Instructions
1. Turn Off the Water Supply
Locate the shutoff valves under the sink and turn them clockwise. Open the faucet handle to relieve pressure and drain any remaining water. If you don’t have shutoff valves, turn off the main water supply to your home. For help with water line issues, see our pipe repair services.
2. Remove the Handle
Pry off the decorative cap (if present) with a flathead screwdriver. Remove the screw underneath and lift off the handle. For stubborn handles, use a handle puller or gently tap with a rubber mallet.
3. Access the Valve Assembly
Depending on your faucet type:
- Compression: Unscrew the packing nut, then lift out the stem. Replace the rubber washer at the base and the O-ring.
- Cartridge: Pull out the retaining clip or unscrew the nut, then remove the cartridge. Take it to the store for a matching replacement.
- Ball-type: Remove the cam, washer, and ball assembly. Replace the neoprene seals and springs inside.
- Ceramic-disk: Remove the cylinder and replace the ceramic disks or the entire cartridge.
4. Clean and Lubricate
Wipe away any mineral deposits or debris inside the valve body. Apply a thin layer of plumber’s grease to new O-rings and seals before reassembling.
5. Reassemble and Test
Reverse the removal steps. Tighten nuts snugly but do not overtighten. Turn the water back on slowly, then open the faucet. Check for leaks. If the drip persists, you may need a deeper repair or professional help. Our leak detection services can pinpoint hidden problems.
When to Call a Professional Plumber
Some leaks are tricky. If you’ve replaced the cartridge or washers and the faucet still drips, the issue could be in the supply lines, valve seat, or water pressure. A licensed plumber can diagnose and fix the problem efficiently. The U.S. Department of Energy notes that fixing leaks can reduce water heating costs by up to 10%—another reason to get it right.
If your leak is accompanied by low water flow or noisy pipes, consider our drain cleaning or water heater repair services. For persistent leaks under the sink, our toilet repair team can also help with related plumbing issues.
Preventive Maintenance Tips
- Clean faucet aerators monthly to prevent debris buildup.
- Replace washers and O-rings every two to three years.
- Install a water softener to reduce mineral scale if you have hard water. Learn more about our water softener systems.
- Avoid using excessive force when closing compression faucets.
Frequently Asked Questions
Why is my kitchen faucet still leaking after replacing the cartridge?
Possible causes include a damaged valve seat, debris in the line, or an incorrect cartridge. Try cleaning the valve body and checking the seat for cracks. If the seat is worn, you may need a seat wrench to replace it.
Can I repair a leaky faucet without turning off the water?
No. Always shut off the water supply before disassembling any faucet. Working under pressure can cause flooding and injury.
How much does it cost to hire a plumber to fix a leaky kitchen faucet?
In the U.S., typical service call fees range from $75 to $200, plus parts. Prices vary by region and complexity. A simple washer replacement may cost less than a full cartridge replacement.
What tools do I need to fix a leaky kitchen faucet?
Basic tools include an adjustable wrench, screwdrivers, an Allen wrench set, plumber’s grease, and a replacement part kit. See the table above for a full list.
How long does a kitchen faucet repair take?
Most DIY repairs take 30 minutes to 1 hour. If you’re unfamiliar with the process, allow extra time. Professional plumbers can usually complete the job in under an hour.
Should I repair or replace my leaky kitchen faucet?
If the faucet is over 10 years old, has multiple leaks, or parts are hard to find, replacement may be more cost-effective. For newer faucets, repairing is usually the better option.
If you’re tired of that drip and want a guaranteed fix, our team at MyTownPlumber can help. Contact us today for a free estimate on faucet repair or replacement.
— MyTownPlumber Editorial Team