A dripping kitchen faucet does more than get on your nerves. It drives up your water bill every month and sends gallons of clean water down the drain. Even a slow leak can waste more than 3,000 gallons in a year, which isn’t great for your wallet or the environment.
Fixing leaks right away keeps minor problems from turning into costly plumbing headaches. You’ll save money, stop the constant drip, and do your part for water conservation. With the right steps—and a little patience—you can handle most leaky faucet repairs yourself. Let’s jump in and tackle that leak once and for all.
Identifying the Cause of Your Kitchen Faucet Leak
Spotting the source of a kitchen faucet leak is the first step to stopping that slow drip. Pinpointing where water escapes—whether from the spout, at the base, or by the handle—makes a world of difference in how you fix it. Understanding your faucet’s inner workings will help you choose the right parts and avoid wasted effort.
Where Is the Leak Coming From?
A leak may look simple on the surface, but even a tiny puddle can have several root causes. Here’s how to find where it starts:
- Spout Drips: If water keeps running or dripping after the faucet is off, the problem is usually inside the faucet, like a worn-out washer, valve seat, or cartridge.
- Base Leaks: Water pooling around the bottom often means O-rings, seals, or mounting nuts are worn or loose.
- Handle Leaks: If water drips from around the handle or its joint, blame a broken O-ring or cartridge seal.
Look closely as you run the faucet, then shut it off. Feel around the spout, base, and handle for moisture. A dry paper towel can help you spot damp spots quickly.
Most Common Causes of Leaks
Most leaks happen for a few common reasons. If you know what to look for, you can save time (and unnecessary part purchases):
- Worn Washers: Washers press against metal valve seats each time you turn the tap on or off. Over time, this friction wears washers thin and they lose their seal.
- Damaged O-rings: These small rubber rings keep water from slipping out along moving parts. When they break down or shift, leaks appear around the handle or base.
- Faulty Cartridges: Newer faucets use cartridges to control water flow and temperature. When these crack or wear out, you get persistent leaks—often from the spout.
- Corroded Valve Seats: The valve seat joins the faucet to the spout. Minerals from hard water corrode it, so even new washers won’t help if the seat is pitted.
- Mineral Buildup: Hard water leaves white, crusty deposits. These can block seals or keep O-rings and washers from fitting snug.
- Loose Connections: If mounting nuts or supply lines are loose under the sink, water can puddle around the faucet’s base or below the sink.
- Water Pressure Issues: High pressure sometimes forces water past seals that would otherwise hold tight. A pressure regulator may be needed if this keeps happening.
Know Your Faucet Type Before Fixing
Every kitchen faucet isn’t built the same—and repairs depend on the design. Take a moment to identify your faucet before grabbing tools:
- Compression Faucets: The classic two-handle model. Turning the handle tightens a washer down against the valve seat. Most common for older kitchens and very likely to leak when the washer wears out.
- Ball Faucets: Single handle design, found often in mid-range or older one-handle sinks. Uses a rotating ball to mix hot and cold. These can leak from worn seals or the ball itself.
- Cartridge Faucets: Single or double handle, common in newer homes. Inside is a replaceable cartridge. Leaks often mean the cartridge must be swapped out.
- Ceramic Disk Faucets: Single lever on a wide base. Uses durable ceramic disks, but even these can leak if sediment builds up or seals wear out.
Finding the type is as simple as looking at the handles and the way the faucet feels when you turn it. Having this knowledge means when you’re ready to disassemble your faucet, you know exactly what parts to check and replace—and your fix is much more likely to succeed.
Photo by Miriam Alonso
Gathering Tools and Replacement Parts for the Job
No one wants to start a repair and find out they’re missing a key tool or the right part. Getting organized before you start is the secret to a quick, stress-free fix. Here’s how to make sure you have everything on hand—from small tools to the exact O-ring or cartridge you need.
Photo by AS Photography
Essential Tools for Kitchen Faucet Repair
You don’t need a fancy toolkit to fix a leaky faucet, but there are a few basics every DIY plumber should have nearby. Grab these before you crawl under the sink:
- Adjustable Wrench: Loosens or tightens nuts and bolts of various sizes.
- Screwdrivers: Flat-head and Phillips to handle most screws on faucet handles and trim.
- Allen Key (Hex Wrench): Some single-handle and newer models use hex screws hidden under the handle.
- Pliers: Channel-lock or slip-joint pliers help grip parts and remove stubborn washers.
- Plumber’s Tape (Teflon Tape): Seals threaded connections and prevents leaks at supply lines or fittings.
- Small Utility Knife: Useful for prying up components or scraping away mineral deposits.
A flashlight or headlamp also makes a difference, especially for spotting leaks and reading part numbers under the sink.
Quick Checklist: Tools for the Job
Run through this list and toss each item in a bucket or tool bag before you begin:
- Adjustable wrench
- Phillips and flat-head screwdrivers
- Allen key (often 1/8″ or 3/32″ for faucet screws)
- Pliers
- Plumber’s tape
- Small utility knife
- Flashlight or lamp
- Old towels (to catch drips and protect surfaces)
- Small cup or magnetic tray (for screws and small pieces)
Common Replacement Parts You’ll Need
Replacing the right part is what actually stops the leak. For almost every leaky faucet, it’s one of these parts wearing out:
- Washers: Usually rubber or brass, used in compression faucets. Replace if your two-handle faucet drips from the spout.
- O-rings: Small rubber rings that seal moving sections on handles and bases. Watch for leaks near the handle or faucet body.
- Cartridges: The heart of most single-handle faucets. Each brand and model uses a specific size and shape, so match it carefully.
- Valve Seats: Found inside compression faucets between the spout and washer. Replace if you see corrosion or pitting.
- Springs and Seals: Used in ball-type faucets; look for repair kits with these included.
Tips for Buying the Right Replacement Parts
The single biggest headache is getting home from the store with the wrong part. Here’s the smart way to avoid extra trips:
- Identify the Brand and Model: Most faucets have the brand or model stamped on the spout, handle, or under the sink. If you don’t see it, check the manual or look for a part number on cartridges or inside the body.
- Take Parts to the Store: If possible, remove the old washer, O-ring, or cartridge and bring it along. Staff at places like Home Depot, Lowe’s, and Ace Hardware can help you find an exact match.
- Buy Kits: Many brands sell repair kits that have all washers, O-rings, and springs you’ll need. These take the guesswork out of what to buy.
- Use Original Parts: OEM (original equipment manufacturer) parts are ideal. They’re made for your faucet and usually last longer.
- Check Reviews and Guides: Online retailers like Lowe’s, Home Depot, and FaucetDirect post compatibility charts and customer reviews—use these to double-check before buying.
- Consider Universal Parts: In a pinch, some universal O-rings and washers work for many models—but always match sizing as closely as possible.
Where to Shop for Faucet Parts
You can find parts at any major home improvement store, hardware store, or specialized plumbing retailer. The most dependable spots:
- Home Depot: Large aisle of faucet repair kits, cartridges, and replacement parts for all major brands. Shop at Home Depot
- Lowe’s: Wide selection organized by faucet brand and repair type. Check out Lowe’s
- Ace Hardware: Good for o-rings, washers, and quick grab-and-go items. Find Ace Hardware Locations
- FaucetDirect or PlumbMaster: Huge online catalogs, ideal for finding parts by brand and model. See FaucetDirect parts
Old faucets or hard-to-find brands? Try searching model numbers online or call the manufacturer—their customer service often helps you track down the exact piece.
Stay organized, double-check your parts, and you’ll be ready to take on even a stubborn leak.
Step-by-Step Guide: How to Fix a Leaky Kitchen Faucet
Stopping a leaky kitchen faucet is often easier than it looks—whether your tap has one handle or two. With the right steps and a bit of patience, you can save water, money, and stress. Here’s a clear, practical guide to make your repair a success.
Shut Off the Water Supply and Prepare the Workspace
Before you grab any tools, play it safe and turn off both hot and cold water under the sink. You’ll find small oval or round shut-off valves connected to the water lines—turn these clockwise until snug. If your valves are stuck or corroded, use a towel for grip or gently loosen them with pliers.
Next, run the faucet until the water stops. This releases any leftover pressure in the lines, so you won’t wind up with a surprise splash during repair.
Always lay out a thick towel or a couple of rags around the inside of the cabinet and under the faucet area. This catches drips and protects the surface from dropped screws or tools.
Photo by Max Vakhtbovycn
Disassemble the Faucet: Handle, Spout, and Valve Access
Most faucets have a cap or cover on the handle—pry it off gently with a small screwdriver or utility knife. Underneath, you’ll see a screw (Phillips, flat-head, or sometimes a hex screw). Loosen and pull the handle off. If your kitchen has two handles, repeat for both.
Remove any decorative collars or escutcheon plates. Set all small pieces in a cup or magnetic tray so nothing goes missing.
For single-handle models, a retainer nut may cover the cartridge or ball assembly—use your adjustable wrench to remove it. On two-handle compression faucets, carefully unscrew the stem to access internal washers and seats. If you meet resistance, use pliers but avoid forcing it; delicate parts can break.
As you go, snap a quick photo of each stage with your phone. This is a handy way to remember the order for reassembly later.
Inspect Internal Seals, O-Rings, Washers, and Cartridges
Now the real detective work starts. Look closely at:
- Washers and O-rings: Rubber may appear cracked, misshapen, or mushy. Worn washers cause spout drips, while bad O-rings often leak at the handle or base.
- Cartridges (Single-handle): Remove and examine for broken seals or mineral buildup. Some cartridges have multiple moving parts or are sealed—replace the entire unit if anything looks questionable.
- Valve seats (Compression style): Shine a flashlight to spot pitting or greenish corrosion. Rub with a finger; if it’s rough, swap out the old seat.
- Mineral deposits: White crusty spots or “gunk” need a gentle scrub. Soak parts in a shallow dish of vinegar for 10–30 minutes, then buff with a soft brush.
The part that looks worn, cracked, or just doesn’t fit snug anymore? That’s the one to replace.
Install New Parts and Reassemble the Faucet
Lay out your new washers, O-rings, or cartridge to double-check size and fit—you want a snug match. Rub a pea-sized dab of plumber’s grease on O-rings and threads (not on ceramic disks). For threaded parts, wrap plumber’s tape around in the same direction as tightening.
Follow this order for most faucets:
- Insert new washers, O-rings, or cartridges.
- Screw stems or nuts back in (hand-tighten first, then snug gently with a wrench).
- Return decorative covers and secure the handle.
For single-handle models, make sure the cartridge grooves align with the faucet slots. On two-handle compression models, the flat side of the washer faces down toward the valve seat.
Never over-tighten—finger-tight plus a slight turn with your wrench is usually enough to prevent future leaks without breaking delicate parts.
Testing for Leaks and Troubleshooting Persistent Problems
Turn the water supply valves back on slowly to avoid a pressure surge. Watch the faucet as you switch the handle(s) on—wait a minute and check for drips or water pooling.
If you notice a leak:
- Tighten nuts or fittings a small amount.
- Double-check each washer and O-ring for alignment.
- Look out for hidden cracks or debris in the faucet body.
- If leaks continue, you may need to replace an additional part or try a cartridge from a different brand.
No luck after a second check? Don’t feel bad—sometimes the fix needs a pro’s touch, especially if your faucet is older or heavily corroded. Most local plumbers can finish up quickly and give you peace of mind.
By using patience and these clear steps, you’ll have your kitchen running dry (and quiet) in no time.
Tips for Preventing Future Faucet Leaks
Keeping your kitchen faucet in shape saves you time, money, and the headache of a surprise leak next month. With just a bit of regular attention and the right habits, you can stop most leaks before they start. These tips below will keep your faucet running trouble-free and help avoid unnecessary repairs in the future.
Keep Up with Routine Maintenance
Simple, regular maintenance does wonders for faucet life. Every few months, check your faucet for early signs of wear:
- Wipe down the faucet and surrounding surfaces to remove grime and watch for hidden drips.
- Tighten any loose handles or mounting nuts with a gentle twist.
- Inspect under the sink for puddles or damp spots that might signal a slow leak.
Plan a yearly checkup even if everything looks fine. Replace rubber washers, O-rings, and seals as needed to avoid sudden failure.
Photo by Kaboompics.com
Clean Faucet Aerators Regularly
Mineral buildup in your faucet’s aerator is a sneaky cause of drips and pressure loss. The aerator is that small mesh screen you find at the end of the spout.
Here’s how to keep it clear:
- Unscrew the aerator by hand or with pliers (use a rag to protect the finish).
- Soak it in vinegar for 15–30 minutes to loosen any deposits.
- Gently scrub off any remaining buildup with a toothbrush.
- Rinse and screw it back on.
Do this twice a year—especially if you have hard water—or sooner if you notice a drop in water flow.
Use High-Quality Replacement Parts
Not all parts are created equal. Choosing high-quality washers, O-rings, and cartridges means less risk of early leaks and less frustration down the road.
- When you replace a part, match it to your faucet brand and model.
- Stick with original manufacturer (OEM) parts for best fit and long-lasting seals.
- Avoid cheap, generic kits that may not hold up over time.
Spending a little more for the right part up front is worth it for peace of mind.
Watch and Adjust Water Pressure
High water pressure can speed up wear on your faucet seals, making leaks much more likely. Household water pressure should sit comfortably between 40–60 psi (pounds per square inch).
To keep your faucet safe:
- Use a simple pressure gauge from any hardware store to test at least once a year.
- If your pressure measures above 80 psi, ask a plumber about installing or adjusting a pressure-reducing valve.
- Address pressure spikes quickly to avoid damaging delicate faucet parts.
Keeping pressure in check extends not just faucet life, but all your plumbing fixtures.
Dry and Protect Faucet Surfaces
Water that sits on faucet surfaces can lead to corrosion over time. After cleaning dishes or washing hands, give your faucet a quick wipe.
- Dry off water from the faucet base and handles.
- Don’t let soapy residue linger, as it can eat away at seals.
Simple habits like this prevent corrosion and keep your faucet looking new.
Schedule a Seasonal Plumbing Check
Don’t just wait for leaks—prevent them by planning quick seasonal plumbing checkups along with regular home maintenance.
A seasonal checklist can include:
- Looking for slow drips or miniature puddles around the faucet and under the sink.
- Testing handles for wobble or extra play.
- Verifying supply line condition and tightness under the sink.
This five-minute habit can catch tiny leaks before they grow.
With ongoing care, your faucet won’t just work like new—it’ll hold up for years. Prevention is far easier (and cheaper) than a surprise kitchen flood.
When to Call a Professional Plumber
Even if you enjoy fixing things yourself, some faucet leaks can get out of hand or point to bigger problems. Certain situations call for an expert’s touch—a pro knows how to spot hidden issues and has tools most homeowners don’t keep under the sink. Not every leak is a simple DIY fix, and pushing ahead when things look questionable can make the problem more expensive down the line.
When DIY Repairs Aren’t Enough
Some leaks are only the tip of the iceberg. Here’s when it’s smarter (and safer) to put down the wrench:
- Severe Corrosion or Rust: If you see green, white, or brown corrosion on the faucet body, valve seat, or pipes, the metal may be breaking down. Swapping washers or O-rings won’t fix a weakened faucet—corrosion spreads and can mean the plumbing is close to failing.
- Valve Seat Damage: The valve seat connects the faucet to the spout. Deep pitting or cracks, especially if you’ve already replaced the washer or O-ring but leaks keep coming back, require professional tools and experience to repair or replace.
- Persistent Leaking Despite New Parts: Still hear a drip after replacing washers, O-rings, or cartridges? If leaks keep returning, you may be dealing with worn-out faucet internals or even a hidden crack in the fixture.
- Low Water Pressure or Gurgling Noises: If the faucet trickles or you hear air or gurgling in the pipes, there could be a blockage deeper in your home’s plumbing or supply lines—not just in the faucet.
- Complex or Built-In Faucet Models: High-end, touchless, or designer faucets can hide electronic parts and specialized cartridges that only a plumber can access safely.
- Water Pooling Under Cabinets: Discover water under the sink or in the cabinet below, especially if it’s not clear where it’s coming from? There might be a hidden pipe or supply line leak.
- Repetitive Clogs or Slow Drains: Multiple drains misbehaving at once, or a faucet paired with a slow sink, can signal something wrong in the broader plumbing system—often beyond simple DIY reach.
Photo by Sergei Starostin
How to Choose a Trustworthy Plumber
When repairs go beyond your toolbox, finding a reliable plumber matters. You want someone who fixes the issue right the first time—and respects your home while doing it. Here’s how to choose wisely:
- Ask Friends or Neighbors: Word of mouth is powerful. People love to share who did a great job (and warn you about those who didn’t).
- Check Licensing and Insurance: Always work with a licensed, bonded, and insured plumber. This protects both you and the plumber in case something unexpected happens.
- Read Online Reviews: Look for consistent praise about punctuality, clear communication, and fair pricing on sites like Google, Yelp, or Angi.
- Get an Upfront Estimate: Before work begins, ask for a ballpark estimate. Transparent pricing sets reputable plumbers apart.
- Look for Emergency Service: Some problems can’t wait until morning. A plumber who offers after-hours help is a definite plus.
What to Expect When the Plumber Arrives
Knowing what happens next makes the call less stressful. Here’s what you can expect:
- Problem Assessment: The plumber will check your faucet and nearby plumbing, ask about the problem, and diagnose the root cause.
- Recommendation and Estimate: After narrowing down the source, you’ll get a clear plan and an estimate. This should cover parts, labor, and expected time.
- Professional Tools and Parts: Plumbers have specialized tools for corrosion, valve seats, and complex assemblies. They’ll use quality replacement parts, matched to your faucet’s brand and model.
- Cleanup: Most plumbers tidy up after themselves and double-check their work for drips or leaks before leaving.
Calling a professional protects your home from bigger water damage and saves time. It gives peace of mind when you aren’t sure what’s really going on behind the scenes. Sometimes, getting an expert is the best fix you can make.
Conclusion
Fixing a leaky kitchen faucet right away keeps your water bill in check, protects your home from costly water damage, and supports water conservation. Tackling leaks early means less risk of mold, pest troubles, and surprise plumbing woes.
By following the simple steps—identifying the leak, gathering the right tools and parts, and making smart repairs—you can handle most fixes yourself and get lasting results. There’s real peace of mind that comes from solving this common problem on your own.
If you run into stubborn leaks or spot signs of bigger trouble, there’s no shame in reaching out for professional help. Your quick action makes a difference, both at home and beyond.
Thanks for following along—share your leak-fixing success or questions below, and help others keep their homes running smooth.