A dripping faucet is one of those tiny household problems that can feel harmless—until you hear it at 2 a.m., see your water bill climb, or notice a growing stain under the sink. The good news is that many drips come from a handful of common issues, and you can often narrow them down with a little patient troubleshooting.

This guide walks you through the real-world causes of faucet drips, how to identify what you’re dealing with, and what to try first. You’ll also learn when it’s smarter (and safer) to stop DIY-ing and call a pro—especially if the “drip” is actually a symptom of a bigger plumbing problem.

Why a “small drip” is worth fixing sooner than later

It’s easy to ignore a faucet that only drips once every few seconds. But a steady drip can waste a surprising amount of water over time. Beyond the water itself, the drip can speed up wear on your drain, stain sinks and fixtures, and encourage mineral buildup that makes future repairs harder.

There’s also the noise factor and the creeping risk of hidden damage. If the drip is coming from the base of the faucet, under the handle, or beneath the sink, you may be dealing with a slow leak that can rot cabinet floors or swell particleboard. Fixing it early is usually cheaper, faster, and far less annoying.

Match the faucet type to the likely cause

Before you buy parts or start taking things apart, it helps to know what kind of faucet you have. Different faucet designs use different internal parts, and the “usual suspects” change depending on the style.

Most household faucets fall into one of four categories: compression, cartridge, ceramic disc, or ball. You don’t need to be a plumbing expert to identify them—simple clues like the number of handles and how the handle moves can often point you in the right direction.

Compression faucets (old-school two-handle)

Compression faucets typically have two handles—one hot, one cold—and you turn them several rotations to fully open or close. Inside, a rubber washer presses against a valve seat to stop the water. Over time, that washer wears down, hardens, or cracks, and the faucet starts to drip.

If you live in an older home, this is one of the most common setups you’ll see. The repair is often straightforward: replace the washer (and sometimes the valve seat). The trick is getting the correct washer size and making sure the seat isn’t pitted or corroded.

Compression faucets are also prone to dripping if someone “over-tightens” the handle. That extra force can deform the washer faster, turning a minor drip into a recurring problem.

Cartridge faucets (smooth handle movement)

Cartridge faucets come in single-handle and two-handle versions. They usually operate with a smoother, more consistent motion than compression faucets. Inside is a cartridge assembly with seals that control flow and temperature.

A drip in a cartridge faucet often comes from worn O-rings, a failing cartridge, or mineral buildup that prevents a tight seal. Sometimes cleaning and re-greasing the O-rings helps, but many times the most reliable fix is replacing the cartridge.

One important note: cartridges are not universal. Even within the same brand, different models use different cartridges, so it’s worth taking the old one to the store (or ordering by model number) to avoid wasting time.

Ceramic disc faucets (modern, durable, but not immune)

Ceramic disc faucets are common in newer homes and tend to be very durable. They use two ceramic discs that slide against each other to control water flow. When they’re clean and aligned, they seal extremely well.

When they drip, it’s often because debris or mineral scale has scratched the discs or is trapped between them. Sometimes a careful cleaning solves it, but if the discs are damaged, the faucet may need a new disc cartridge.

These faucets can be less forgiving of grit in the water. If you’re seeing repeat issues, it may be worth checking your aerator screens and considering a whole-home sediment filter if you’re on a well or have older pipes.

Ball faucets (single-handle with a “cam” assembly)

Ball faucets are typically single-handle and use a rotating ball mechanism with multiple seals and springs. They’re common in some older kitchen setups. Because there are more small parts involved, there are more potential leak points.

Drips here often come from worn springs, seals, or the cam washer. Many hardware stores sell a repair kit with the typical replacement parts. It’s a bit more fiddly than swapping a washer, but still very doable if you keep parts organized.

If you’re not sure what you have, don’t worry—later in this guide, you’ll use symptoms (where the water appears) to narrow down the likely culprit, even without identifying the faucet type perfectly.

Start with the simplest checks before disassembling anything

It’s tempting to grab tools immediately, but a few quick checks can save you time. Some “faucet drips” aren’t actually caused by the faucet internals, and some are the result of a tiny external issue like a loose aerator.

These checks are quick, low-risk, and can prevent you from tearing apart a faucet that’s actually fine.

Check whether the drip is from the spout or from somewhere else

Watch the faucet closely and identify the exact point where water forms. If it’s dripping from the spout, the shutoff mechanism inside the faucet isn’t sealing completely. That typically points to a washer, cartridge, disc, or seat issue.

If the water is appearing around the handle, under the lever, or at the base where the faucet meets the sink, you’re more likely dealing with an O-ring, packing nut, or base gasket problem. Those often show up as a slow weep that runs down the faucet body rather than a clean drip from the spout.

If you see water under the sink, check whether it’s dripping from the faucet supply lines, shutoff valves, or the sprayer hose connection (for kitchen faucets). A “dripping faucet” complaint is sometimes actually a supply connection leak.

Remove and clean the aerator

The aerator is the small screen at the tip of the faucet spout. Mineral buildup or debris can change flow patterns and sometimes cause water to cling to the spout and drip even when the faucet is off. That can look like a leak when it’s really just leftover water releasing slowly.

Unscrew the aerator (use a cloth and gentle pliers if it’s stuck), rinse it, and soak it in vinegar for 15–30 minutes if there’s scale. Reinstall it and see if the dripping changes.

If the drip continues at the same rate and forms from inside the spout, you’re likely dealing with an internal sealing issue, and it’s time to move on to the deeper troubleshooting steps.

Confirm your shutoff valves work (and don’t leak)

Before you take anything apart, locate the shutoff valves under the sink. Turn them clockwise to close. If they’re stiff, don’t force them aggressively—older valves can break or start leaking when disturbed.

After closing the valves, open the faucet briefly to relieve pressure and drain the lines. If you notice water dripping from the valve stem or around the valve body while you’re doing this, you may have discovered a second problem that needs attention.

If the shutoff valves won’t fully close, you can still do some repairs by shutting off water to the whole house, but that’s a good moment to ask yourself whether the job is still “simple” or if it’s time for professional help.

Tools and supplies that make faucet repairs smoother

You don’t need a workshop to fix a dripping faucet, but having a few basics on hand can make the difference between a clean repair and a frustrating afternoon. Most faucet fixes involve small fasteners and parts that are easy to lose.

Gather your tools before you start so you’re not scrambling with the faucet half-disassembled.

Basic tools most people already have

A Phillips and flathead screwdriver, an adjustable wrench, and a pair of slip-joint pliers cover a lot of faucet repairs. An Allen key set is also helpful because many handles are secured by a small set screw.

A utility towel or rag is important for protecting finished surfaces. When you use pliers on chrome, wrap the jaws with a cloth or use painter’s tape to prevent scratches.

A flashlight or headlamp helps more than you’d expect, especially when you’re trying to see a tiny retaining clip or a hairline crack in a plastic part.

Supplies that prevent repeat leaks

Plumber’s grease (silicone-based) is useful for O-rings and moving parts. It helps parts seat properly and reduces wear. Avoid petroleum-based products that can degrade rubber.

White vinegar is great for dissolving mineral buildup. A small bowl and an old toothbrush make cleaning parts much easier.

It’s also smart to have a small container or magnetic tray for screws and clips. Faucet parts love to disappear down the drain or into the cabinet abyss.

A simple troubleshooting path based on where you see water

If you’re not sure what faucet type you have, you can still troubleshoot by following the water. The location of the leak often points to the specific part that’s failing.

Use the sections below like a decision tree: start with the symptom that matches what you’re seeing, then try the most likely fix first.

Drip from the spout when the faucet is off

This is the classic drip: water forms at the spout outlet and falls into the sink. In most cases, the internal shutoff mechanism isn’t sealing: a worn washer (compression), worn cartridge (cartridge faucet), damaged ceramic discs (ceramic disc), or worn seals/springs (ball faucet).

Start by turning off the shutoff valves, then disassemble the handle to access the internal components. If it’s a compression faucet, inspect the washer and the valve seat. If it’s a cartridge or ceramic disc faucet, plan to remove and inspect the cartridge assembly.

Also pay attention to water quality. If you have hard water, mineral scale can prevent a clean seal even if parts aren’t fully worn out. Cleaning can sometimes buy you time, but replacing worn parts is usually the long-term fix.

Water leaking from under the handle

If water pools around the handle or drips down from the handle area when the faucet is on (or sometimes even when it’s off), the issue is often an O-ring, packing nut, or cartridge seal.

In many faucets, tightening a packing nut slightly can reduce handle-area leaks. But don’t crank it down—over-tightening can make the handle hard to turn and can accelerate wear.

If tightening doesn’t help, you’ll likely need to replace O-rings or the cartridge. When you remove the cartridge, look for mineral deposits and clean the housing gently before installing new parts.

Water leaking at the base of the faucet

Leaks at the base (where the faucet meets the sink or countertop) are often caused by a worn base gasket, loose mounting hardware, or a failing O-ring on a swiveling spout. This is common in kitchen faucets where the spout rotates frequently.

Try gently tightening the mounting nuts under the sink first. If the faucet still wiggles or leaks, you may need to lift the faucet and replace the gasket or add plumber’s putty (depending on the faucet design—some use gaskets only, others use putty).

If the leak only happens when you move the spout, focus on the spout O-rings. Those can often be replaced without removing the entire faucet, but the exact steps vary by model.

Dripping under the sink near the supply lines

If the “drip” is under the sink, check the supply line connections at both ends: the shutoff valve and the faucet inlet. A slow drip here can be caused by a slightly loose compression nut, a worn ferrule, or a failing braided supply line.

Try tightening the nut by a small amount—think quarter-turn adjustments. Over-tightening can damage threads or crush parts, making the leak worse.

If you see corrosion, bulging, or fraying on a braided line, replace it. Supply line failures can turn from a drip into a flood much faster than most people expect.

Step-by-step: fixing the most common drip scenarios

Now let’s get hands-on. Below are practical, step-by-step approaches for the most common faucet designs. Even if your faucet is slightly different, the general workflow is similar: shut off water, relieve pressure, disassemble carefully, replace worn parts, reassemble, and test.

Take photos as you go. It’s a simple trick that makes reassembly much easier, especially when you’re dealing with stacked parts that can be installed in the wrong order.

Compression faucet: replacing a worn washer

First, shut off the water under the sink and open the faucet to drain remaining water. Plug the sink drain so small screws don’t vanish. Remove the handle (often a screw hidden under a cap), then use an adjustable wrench to remove the stem assembly.

At the bottom of the stem, you’ll find a rubber washer held by a screw. Remove the screw, replace the washer with the same size, and inspect the valve seat inside the faucet body. If the seat looks rough or pitted, you may need a seat wrench to remove and replace it—or a seat dressing tool to smooth it.

Reassemble the stem, reinstall the handle, turn water back on slowly, and test. If the drip is gone but the handle feels too tight or too loose, adjust gently. A compression faucet should close firmly without needing excessive force.

Cartridge faucet: swapping the cartridge and refreshing O-rings

After shutting off water and relieving pressure, remove the handle. Depending on the model, you may need to remove a decorative cap, a set screw, and a retaining nut or clip holding the cartridge in place.

Pull the cartridge straight out. Some are stubborn due to mineral buildup—gentle wiggling helps, and cartridge puller tools exist if needed. Once removed, inspect O-rings and the cartridge body for damage. Clean the cartridge housing with vinegar and a soft brush if there’s scale.

Install the new cartridge in the same orientation as the old one, lubricating O-rings lightly with silicone plumber’s grease. Reassemble and test. If the water temperature is reversed after reassembly, the cartridge may be installed backwards—this is a common, easy-to-fix mistake.

Ceramic disc faucet: cleaning or replacing the disc cartridge

Shut off the water, remove the handle, and access the ceramic disc cartridge (usually held by screws). Lift it out carefully and check for debris, grit, or scale. Rinse parts and soak mineral-coated components in vinegar.

If cleaning doesn’t help, replace the cartridge. Ceramic parts can be scratched, and once scratched, they may never seal perfectly again. When reinstalling, make sure the seals are seated correctly and screws are snug but not over-tightened.

After reassembly, turn the water on slowly. A sudden blast of pressure can sometimes dislodge newly seated seals if everything isn’t aligned well.

Ball faucet: replacing springs, seats, and cam washer

Ball faucets have a few more parts, so organization matters. Shut off water, remove the handle, and carefully disassemble the cap and cam assembly. You’ll typically find rubber seats and small springs beneath.

Replace the springs and seats using a repair kit made for your faucet. Inspect the ball for wear or mineral buildup and clean it. If the ball is scratched or worn, replacing it may be necessary for a lasting fix.

Reassemble in the correct order and test. If the faucet leaks when you move the handle, double-check that the cam washer is aligned properly and that the cap is tightened evenly.

Hard water, pressure issues, and the sneaky problems that keep drips coming back

Sometimes you replace the obvious worn part…and the drip returns a week later. That’s usually a sign that something else is contributing, like mineral buildup, high water pressure, or a damaged valve seat that keeps chewing through washers.

These underlying factors are worth addressing so your fix actually lasts.

Mineral buildup that prevents a tight seal

Hard water leaves deposits on internal faucet parts, especially around sealing surfaces. Even a thin crust can keep a washer or disc from sealing fully, creating a persistent drip.

Cleaning parts with vinegar helps, but if scale is heavy, it can also hide damage underneath. If you see recurring buildup, regular aerator cleaning and occasional faucet maintenance can reduce problems.

If your whole home struggles with scale—spotty dishes, crusty showerheads, stiff valves—it may be time to look into water treatment options. That’s not a faucet repair, but it can dramatically cut down on repeated leaks.

High water pressure that stresses seals and cartridges

High water pressure can make small imperfections leak and can wear out seals faster. If you notice banging pipes (water hammer), frequent fixture leaks, or a very forceful flow, pressure might be too high.

You can test pressure with an inexpensive gauge that screws onto an outdoor spigot or laundry connection. Many homes are happiest around 40–60 psi; consistently higher than that can cause premature wear.

If pressure is high, a pressure-reducing valve (PRV) may be needed. That’s typically a job for a plumber, but it’s a long-term investment in protecting fixtures and appliances.

A damaged valve seat that keeps ruining washers

In compression faucets, a worn valve seat can be the reason a brand-new washer still drips. The washer presses against the seat every time you close the handle, and if the seat is pitted, it’s like sealing against sandpaper.

Sometimes you can smooth the seat with a dressing tool. Other times, replacing the seat is the right move. If the seat is not removable or the faucet body is heavily corroded, replacing the entire faucet may be more practical.

This is also where DIY can get frustrating: you can keep changing washers, but the real issue is the seat. If you’ve replaced the same part twice and the drip returns quickly, step back and look for the deeper cause.

When it’s smarter to call a plumber (and what to say when you do)

DIY faucet fixes are great when the problem is simple and accessible. But there are times when calling a plumber saves money and stress—especially if you’re dealing with stuck shutoff valves, corroded fittings, or signs of a leak inside the wall.

If you’re in the middle of a repair and water won’t fully shut off, parts are seized, or the faucet body is cracking, it’s completely reasonable to hand it off to a professional.

Red flags that mean “stop and reassess”

If the shutoff valves under the sink won’t close, or they start leaking when you touch them, that’s a big sign to pause. A simple faucet drip can turn into a more complicated valve replacement pretty quickly.

Also watch for water stains, swelling cabinet floors, moldy smells, or damp drywall near plumbing lines. Those symptoms suggest the “drip” may not be limited to the faucet at all.

And if you’re in a situation where you need water restored quickly—like a stuck cartridge with water still running—having a reliable pro on call matters. In that kind of pinch, reaching out to an emergency plumber Stamford CT can be the difference between a minor inconvenience and a bigger cleanup.

How to describe the problem for faster help

When you call, share the symptom and location: “drips from spout when off,” “leaks under handle when on,” or “water under sink at supply line.” Mention whether you have a single-handle or two-handle faucet and whether you’ve already tried cleaning the aerator or tightening connections.

If you know the brand (often printed on the faucet base or handle), share it. A plumber can sometimes bring the right cartridge or kit on the first visit with that info.

And if the issue happens outside normal hours—like a supply line leak that won’t stop—having access to a 24/7 plumber Norwalk CT can be a real relief, especially when you’re trying to prevent water damage overnight.

Preventing future drips with small habits that actually work

Once you’ve fixed the drip, a few simple habits can keep your faucet working smoothly for longer. Most drips come from wear, buildup, or unnecessary strain on parts—so prevention is often about being gentler on the fixture and keeping it clean.

These tips aren’t complicated, but they’re the kind of small things that add up over years.

Don’t over-tighten handles

With compression faucets in particular, people often crank the handle down to “make sure it’s off.” That extra force compresses washers more than necessary and can deform them over time.

A better approach is to close the handle firmly but gently. If you feel like you need to muscle it, it may be a sign the washer or seat is already wearing out.

For single-handle faucets, avoid snapping the handle shut. Smooth, controlled movement is easier on cartridges and seals.

Clean aerators and sprayer heads regularly

Aerators and sprayer heads trap grit and mineral scale. When they clog, pressure and flow patterns change, sometimes causing sputtering, uneven streams, or dripping after shutoff.

Unscrewing and soaking these parts in vinegar every few months (more often with hard water) keeps things flowing and reduces the chance that debris gets pushed deeper into the faucet mechanism.

If you have a pull-down kitchen faucet, also check the hose connection periodically. A slow leak there can mimic a faucet problem while actually being a hose or fitting issue.

Pay attention to small changes in feel and sound

Faucets often give warning signs before they start dripping: a handle that feels gritty, a squeak when turning, or a slight delay before the water fully shuts off.

If you catch those early, you can often clean and lubricate parts or replace a simple O-ring before it turns into a full-on drip.

And if you’re planning other plumbing updates—like replacing shutoff valves, addressing pressure issues, or upgrading fixtures—it can help to work with a provider that offers broader plumbing services Wilton CT so everything gets handled in a coordinated way rather than as a series of emergencies.

A quick troubleshooting cheat sheet you can save

If you want a fast recap, here’s a practical way to think about it: identify where the water appears, match it to the likely failing part, and start with the least invasive fix.

Drip from spout when off usually means an internal seal issue (washer/cartridge/discs). Water under the handle often points to O-rings or packing. Water at the base is commonly a spout O-ring or base gasket. Water under the sink is often a supply line or valve connection.

What to do if you can’t find the exact replacement part

If you remove a washer or cartridge and can’t find an exact match, don’t guess—especially with cartridges. Bring the old part to a plumbing supply store or take clear photos from multiple angles, including any model numbers.

For washers and O-rings, matching size and thickness matters. A slightly wrong size can “almost” work but fail quickly, which is frustrating because it feels like you did everything right.

If your faucet is very old or parts are discontinued, replacing the faucet may be more cost-effective than hunting rare components. In many cases, a new faucet also improves water efficiency and usability.

Testing after the repair: how to know it’s truly fixed

After reassembly, turn the water back on slowly and watch closely with a dry paper towel around connections and under the handle. Paper towels make it easier to spot tiny weeps that you might miss with the naked eye.

Run the faucet for a minute, then shut it off and watch for at least another minute. Some drips happen only after pressure stabilizes, so don’t declare victory too quickly.

Finally, check under the sink again after an hour. A slow seep can take time to show up, and catching it early can save your cabinet from damage.

A dripping faucet can be annoying, but it’s also one of the most approachable home repairs once you know what you’re looking for. With a careful approach—identify the leak location, match the faucet type, replace the right wear parts, and address buildup—you can usually get back to a quiet sink and a happier water bill.