The good news is that most kitchen faucet leaks are caused by small, replaceable parts such as a worn O-ring, washer, cartridge, or seal. With a few basic tools and the right replacement part, many homeowners can fix leaky kitchen faucet in about 30 to 60 minutes without calling a plumber.
The good news is, you probably won’t have to call a plumber.
Most kitchen faucet leaks are caused by a worn-out component, something small and cheap, such as an O-ring or a cartridge. It only takes a few hand tools, a trip to the hardware store, and 30-60 minutes to fix a leaky kitchen faucet. Check out this guide to learn how to fix leaky kitchen faucet, from finding the leak to tightening everything back up.
Who This Guide Is For
This guide is for homeowners who have a dripping or leaking kitchen faucet and want to fix a small, common leak without calling a plumber. It is best for beginners and DIY homeowners who are comfortable using basic tools like a wrench, screwdriver, pliers, and Allen key.
This guide is especially useful if the leak is coming from the faucet spout, handle, base, aerator, cartridge, O-ring, washer, or supply connection under the sink.
However, this guide is not for major plumbing problems, broken shut-off valves, leaks inside the wall, cracked faucet bodies, severe corrosion, or repeated leaks after replacing parts. In those cases, calling a licensed plumber is the safer choice.
Quick Answer: How Do You Fix Leaky Kitchen Faucet?
To fix leaky kitchen faucet, first shut off the water supply under the sink. Then identify where the leak is coming from: the spout, handle, base, or supply line. Most leaks are caused by a worn cartridge, O-ring, rubber washer, valve seat, or loose connection. Remove the handle, replace the damaged part with an exact match, reassemble the faucet, and turn the water back on slowly to test for leaks.
Tools and Supplies You’ll Need Before You Start
Do not start taking the faucet apart until your tools and replacement parts are ready.. It’s bad enough to pause in the middle of a repair to run to the store, but it’s bad enough to leave your water on for hours.
Here’s what to have on hand:
| Tool / Material | Description |
| Adjustable wrench and pliers | For loosening nuts and freeing components. |
| Allen wrench/hex key set | Nearly every faucet handle has a set screw underneath. |
| Phillips and flathead screwdrivers | For screws holding caps or plates. |
| Cartridge / O-ring replacement | Depending on the brand and model of your faucet. |
| Plumber’s grease | Used to lubricate new O-rings so they are correctly seated on the O-ring. |
| Teflon tape/plumber’s tape | For wrapping threaded connections under the sink. |
| White vinegar and a small brush | To dissolve mineral buildup on the aerator and its internal parts. |
| Towels or rags | To protect the sink and surrounding surfaces and catch any small parts or drips. |
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Towels and a sink strainer to protect the basin and stop tiny screws from falling down the drain. This last one is more important than people realize. A lost screw can turn a 45-minute job into an agonizing trip to the hardware store.
How to Fix a Leaky Kitchen Faucet
Step 1: Stop the Water First
This seems obvious, but it’s worth mentioning in detail.
See the valves on the water supply line beneath the sink — typically two small oval-handled valves — and turn them clockwise until they stop. Turn on the faucet handle to release the pressure and drain any water still in the lines.
Safe tip: Don’t skimp on this step. If you loosen the faucet line with water running to it, you may find yourself with a small flood — and water damage from under a sink cabinet is expensive to repair.
Pro tip: If those under-sink valves haven’t been touched in years, they might be stuck. Don’t force them — old valves can crack or snap off. Turn off the main water supply to your house instead. It takes a few extra minutes but it will save you a much bigger headache.
Step 2: Figure Out Where the Leak Is Actually Coming From
Not all faucet leaks are the same; where the water appears will tell you a lot about what’s failing inside the faucet.
- kitchen faucet leaking from spout:
If water is pooling near the bottom of the faucet near the sink, it could be a dry-out or cracked O-ring that seals the faucet body where it meets the sink deck.
- Kitchen faucet leaking from the handle:
Water seeping out of the handgrip could indicate a loose adjusting ring, a worn-out seal, or damage to the cartridge housing inside the handle.
- Kitchen faucet leaking under the sink:
A leaky faucet head may have nothing to do with it at all. Check the water supply lines and the point they attach to the faucet and shut-off valves. Lost fittings or faulty line seals could be the problem, particularly in older homes.
Step 3: Know What Type of Faucet You Have
In addition, before you start shopping for parts, make sure you know what is inside the faucet. It’s not universal, so a Moen cartridge will not work with a Delta faucet, or an O-ring too small will just make it worse.
Check for a logo on the base of the spout. The major brands stamp that right there. The big three in the US are Moen, Delta, and Kohler — and each brand has parts you can find at any home improvement store.
Beyond the brand, you need to know the internal mechanism:
| Faucet Type | Handle Style | What Typically Fails |
| Compression | Two handles (separate hot/cold) | Rubber washer at the bottom of the valve stem |
| Ball | Single handle | Metal ball, springs, rubber seats, O-rings |
| Cartridge | Single or double handle | The cartridge itself (plastic or brass) |
| Ceramic disc | Single handle (wide base) | Rubber seals on the underside of the ceramic cylinder |
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Pro tip: When you remove the old part, bring it to the hardware store. Don’t just describe it. Bring it. This is particularly important when the cartridge is essentially the same between brands but is machined differently. Getting exactly the same part is important.
Step 4: Fix the Leak — Instructions by Faucet Type
Fixing a Cartridge Faucet (Most Common in US Kitchens)
Cartridge-style faucets are the most common in American kitchens. The good news? They are easy to replace. Here is how:
- Pry off the cap over the handle with a flathead screwdriver.
- Use your Allen wrench to remove the set screw below.
- Pull the handle straight up and off.
- Remove the retainer nut or clip holding the cartridge in place — this can be done with pliers.
- Pull the old cartridge straight up and out. Some of these are stubborn, and pliers will work here.
- Drop the new cartridge into place and make sure the tabs on each end are centered on the slots on the faucet body.
- Reassemble in reverse order and slowly turn the water back on for testing.
If hot and cold are reversed when reassembly is complete, pull the cartridge out and flip it.
Fixing a Ball-Type Faucet (Common on Older Single-Handle Faucets)
Ball faucets have more moving parts than cartridge-style faucets, so it is worth buying a repair kit at the hardware store; it will include the ball, springs, rubber seats, and O-rings all at once. Here is how:
- Loosen the set screw and remove the handle.
- Using a wrench, remove the cap and collar.
- Pull the plastic cam and washer off and the ball itself out.
- Remove the small springs and rubber seats from inside the faucet body with a screwdriver.
- Drop in new springs and rubber seats.
- Insert the new ball through the groove on the ball into the hole in the faucet.
- Install the cam, washer, and cap. Spray any new O-rings with plumber’s grease before screwing them in.
- Reassemble and test.
Fixing a Ceramic Disc Faucet
Ceramic disc faucets are made to last and rarely need replacing completely. The rubber seals on the bottom of the disc cylinder only need to be changed. Here is how:
- Remove the handle by loosening the set screw with an Allen wrench.
- Lift off the escutcheon cap (the decorative sleeve around the cylinder).
- Unscrew the retaining screws holding the ceramic cylinder in place — usually three of them.
- Lift out the cylinder and flip it over. You’ll see the rubber seals on the underside.
- Pull them out and take them to the hardware store for exact replacements.
- While you’re there, clean the inside of the faucet body with white vinegar on a small brush to dissolve any mineral deposits.
- Press in the new seals, reassemble, and turn the water on slowly.
Fixing a Compression Faucet
Compression faucets are the oldest. They have two separate handles – one for hot and one for cold. They’re still common in older homes. Here is how:
- Start by identifying the handle that is leaking, then shut off only one supply valve at a time. If the drip stops, it is time to repair that side.
- Remove the handle and use a wrench to loosen the packing nut underneath.
- Pull out the valve stem. At the bottom is a rubber washer held in place by a brass screw.
- Unscrew it and replace with a match made exactly like the washer. Glaze lightly with plumber’s grease.
- In addition to removing the stem, make sure to remove the O-ring on the outside of the stem as well.
- Reassemble and test.
Step 5: Clean the Aerator and Check Your Connections
While everything is apart, take the time to clean the faucet aerator, the small screen at the tip of the spout. A buildup of minerals in the aerator can lead to low water pressure and uneven spray patterns that people mistake for a leak.
Unscrew the lid by hand (or gently with pliers if it’s stuck), place it in a cup of white vinegar for 20–30 minutes, scrub with an old toothbrush, and rinse.
If you plugged any outlet connections under the sink with new fittings, tape the ends with Teflon tape. It will keep the connection dry and stop drips from taking place at the connection points.
When you are ready to turn the water back on, do so slowly and open the shut-off valves slowly. A sudden surge of pressure could rip seals loose before they have a chance to properly place.
Common Mistakes to Avoid When Fixing a Leaky Kitchen Faucet
Avoid forcing old shut-off valves. If they feel stuck, turn off the main water supply instead of twisting too hard.
Do not guess the replacement part. Bring the old cartridge, washer, O-ring, or repair kit part to the hardware store so you can match it exactly.
Do not overtighten the handle or fittings. Too much force can damage threads, crack plastic parts, or crush rubber seals.
Do not forget the aerator. Mineral buildup inside the aerator can cause weak flow, uneven spray, or symptoms that look like a faucet problem.
Do not turn the water back on too quickly. Open the shut-off valves slowly so the new seals have time to seat properly.
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Frequently Asked Questions
How do I stop the kitchen faucet from dripping?
Shut off the water supply under the sink. Take the handle off, look for the worn part (cartridge, O-ring, or rubber washer), replace it with an exact match, and reassemble. Most repairs take less than an hour.
Can I fix a dripping faucet myself?
Yes — and most homeowners do. You need a few basic hand tools, a part that usually costs between $5 and $30, and about 30 to 60 minutes. No special plumbing knowledge required.
Why is my kitchen faucet leaking when turned off?
If the faucet continues to drip even after you have turned the handle all the way, the seal inside has failed. It may be that your cartridge, valve seat, or rubber washer is no longer providing a tight enough seal. Replacing the worn part will fix the problem completely.
What happens most often when you experience a leaky faucet?
Normal wear and tear on rubber parts. Over time, friction, heat variations, and hard water deposits will wear out washers, O-rings, and cartridge seals. This is not a sign that the faucet is broken; it just means something needs to be replaced.
When should I call a professional?
If the faucet body is cracked, the shut-off valve is broken, or leaks persist after multiple attempts.
Can a leaking faucet cause water damage?
Yes, even slow drips can damage cabinets and flooring over time. Act quickly to prevent mold or rot.
When to Call a Professional Instead
Most leaks from kitchen faucets are DIY-friendly, but a few need a plumber:
- The body of the faucet is cracked.
- The main shut-off valve under the sink is broken or leaky.
- The water is coming from behind the wall or cabinet.
- You have had the parts changed a couple of times, and the drip keeps coming back.
- There is visible corrosion or rust on the supply lines.
These aren’t jobs that a new washer can solve. Even a simple $25 kitchen faucet repair attempted without experience can turn into a $500 water damage situation.
Final Thoughts
A leaky kitchen faucet is no homeowner’s disaster. This faucet leak fix is the perfect project for a weekend afternoon. When you know where the water is coming from, which faucet it is, and which part has worn out, the repair should be fairly easy. It’s turning off the water, replacing the worn part, and turning it back on slowly. That’s about it.
Moving forward, be gentle on the handles. Cramming them tightly will not help prevent drips; it will clog up the sealing joints and cause leaks. A light touch will prolong the life of everything inside the faucet.
If you still have water dripping after doing these steps, or you have more serious issues like a cracked body or a supply line issue, then the time to call a professional is now. Sometimes the problem is bigger than a cartridge change. But most of the time? You got this.
Editorial Note: This article has been reviewed by a professional plumber with many years of hands-on experience to ensure the guidance is accurate, practical, and safe for homeowners.
