A dripping faucet may seem like a small problem, but it should not be ignored. Even a slow drip can waste water, leave mineral deposits around the fixture, and become more difficult to repair over time.
Learning how to fix a dripping faucet starts with finding the source of the leak. A worn washer may cause the problem in one faucet, while another may have a damaged cartridge, O-ring, or valve component.
Many minor faucet leaks are suitable for careful DIY repair. However, the correct approach depends on the faucet design and its condition.
Why Does a Faucet Keep Dripping?
A faucet controls water by opening and closing internal components. These parts experience repeated movement whenever you use the tap.
Over time, seals can wear out. Mineral deposits may also build up inside the fixture. In other cases, a loose or damaged component prevents the faucet from shutting off completely.
Common causes include:
- Worn washers
- Damaged O-rings
- Faulty cartridges
- Worn valve seats
- Mineral buildup
- Loose internal components
- Corrosion
- Damaged seals
Before replacing anything, identify where the water is coming from and what type of faucet you have.
First, Identify Where the Faucet Is Leaking
Not every faucet leak comes from the same place.
Water dripping continuously from the spout usually points to a problem with the internal valve, cartridge, washer, or seal.
Water appearing around the handle may indicate a worn O-ring or another seal. A leak around the base of the faucet can have a different cause.
Look carefully before taking the fixture apart. This simple inspection can prevent unnecessary work.
If you notice water underneath the sink instead, inspect the supply connections and surrounding plumbing rather than assuming the faucet mechanism is responsible.
Our guide to common plumbing problems at home can also help you distinguish a faucet problem from other household plumbing issues.
Know Your Faucet Type
The repair method depends heavily on the faucet design.
Compression Faucets
Compression faucets commonly have separate hot and cold handles. Turning a handle tightens a stem against a washer to stop the water.
A worn rubber washer is a common reason these faucets drip.
Cartridge Faucets
Cartridge faucets use an internal cartridge to regulate water flow. They may have one or two handles.
When the cartridge or its seals wear out, water may continue dripping after you close the faucet.
Ceramic-Disc Faucets
These faucets use ceramic discs inside a cylinder to control water.
They are generally durable, but damaged seals, debris, or problems inside the ceramic-disc assembly can cause leaks.
Ball Faucets
Ball-type faucets usually have a single handle that moves over a rounded cap.
Several internal parts work together inside these fixtures. Worn seals, springs, or other components may eventually cause dripping.
If you cannot identify the faucet type, look for the manufacturer’s name or model information before buying replacement parts.
Tools and Materials You May Need
The exact tools depend on the faucet, but a basic repair may require:
- Adjustable wrench
- Screwdrivers
- Allen key
- Pliers
- Replacement washer, O-ring, cartridge, or repair kit
- Clean cloth
- Small container for parts
- Plumber’s grease approved for faucet components
You may not need everything on this list.
Whenever possible, identify the faulty component before purchasing replacements. Taking the old removable part with you can also make matching it easier.
Turn Off the Water Before Starting
Always shut off the water supply before disassembling a faucet.
Most sinks have separate shutoff valves underneath for hot and cold water. Turn them off carefully, then open the faucet to release remaining pressure.
Test the faucet before proceeding.
If a shutoff valve is seized, damaged, leaking, or will not completely stop the water, do not force it. An old valve can break and turn a small repair into a larger plumbing problem.
In that situation, consider getting professional help.
Protect the Sink and Drain
Close or cover the drain before removing small faucet components.
Screws, washers, clips, and other tiny pieces can easily fall into the drain. A towel placed in the sink can provide additional protection and reduce the chance of damaging the sink surface with tools.
Keep removed components together and arrange them in the order you remove them.
Taking a quick photo at each stage can also make reassembly easier.
Remove the Faucet Handle Carefully
The handle usually needs to come off before you can reach the internal mechanism.
Depending on the faucet, a screw may be visible or hidden beneath a decorative cap. Some handles use a small set screw.
Avoid forcing a handle that will not move.
Mineral deposits can make old components difficult to remove. Excessive force may damage the finish or break a part that was otherwise usable.
Manufacturer instructions are particularly useful at this stage because faucet designs vary considerably.
Check for a Worn Washer
In a compression faucet, inspect the washer at the bottom of the valve stem.
A washer that has hardened, cracked, distorted, or worn unevenly may no longer create a proper seal.
Replace it with the correct size and type.
Using a washer that merely looks similar is not always enough. A poor fit may allow the faucet to continue dripping.
Also inspect the screw or fitting that holds the washer in place.
Inspect the O-Rings
O-rings are small rubber seals used in many faucets.
With age, an O-ring can become brittle, flattened, cracked, or loose. Water may then escape around the handle or another moving component.
If an O-ring appears damaged, replace it with one of the correct dimensions and material.
A small amount of faucet-safe lubricant may help during installation when the manufacturer recommends it.
Check the Cartridge
A worn cartridge is a common source of leaks in modern faucets.
Once you have removed the handle and retaining components, the cartridge may pull or lift from the faucet body. However, the exact procedure varies by manufacturer.
Examine the cartridge and its seals for visible wear or damage.
In many cases, replacing the complete cartridge is more practical than attempting to repair its individual internal parts.
Use the faucet model number when possible. Cartridges that look alike may not be interchangeable.
Inspect for Mineral Deposits
Hard-water minerals can accumulate around faucet components and interfere with proper sealing.
Look for white, chalky, or crusty deposits around accessible parts.
Gentle cleaning may restore movement when buildup is minor. However, avoid aggressive scraping that could scratch a sealing surface or damage the fixture.
Use cleaning products that are suitable for the faucet material and follow the manufacturer’s recommendations.
Examine the Valve Seat
In some faucets, the washer or sealing component presses against a valve seat.
Corrosion or mineral deposits on this surface can prevent a complete seal even after you install a new washer.
Minor deposits may sometimes be cleaned. Significant corrosion or physical damage can require more extensive repair.
If the valve seat is built into the faucet body and is badly damaged, replacing the faucet may be more practical.
Reassemble the Faucet
Once you have replaced or cleaned the necessary component, put the faucet back together in reverse order.
Avoid overtightening screws, nuts, and other fittings.
More force does not necessarily produce a better seal. Overtightening can damage threads, distort seals, or crack components.
Make sure each part sits in its correct position before moving to the next one.
Turn the Water Back On Slowly
After reassembly, make sure the faucet is closed.
Gradually reopen the shutoff valves. Then operate the faucet and inspect the repaired area.
Look around:
- The spout
- Faucet handles
- Faucet base
- Supply connections underneath the sink
Dry these areas with a cloth first. Fresh moisture will then be easier to detect.
Watch the faucet for a few minutes rather than assuming the repair worked immediately.
What If the Faucet Still Drips?
A continuing drip does not necessarily mean you performed the repair incorrectly.
Another component may be worn, or the replacement part may not match the faucet exactly. Mineral buildup or internal damage can also prevent a good seal.
Go back through the diagnosis before replacing additional parts.
Repeatedly changing components without identifying the cause can waste both time and money.
Avoid Overtightening the Faucet Handle
Some people respond to a dripping faucet by closing the handle as tightly as possible.
That may temporarily reduce the drip, but it can increase wear on washers and other internal components.
Use normal pressure when turning the faucet off.
If the faucet requires excessive force to stop the water, investigate the underlying problem instead.
When Is It Better to Replace the Faucet?
Repairing an existing faucet often makes sense when the fixture is otherwise in good condition.
Replacement may be worth considering when:
- The faucet is badly corroded.
- Several internal parts are failing.
- Replacement components are unavailable.
- The faucet body is damaged.
- Leaks repeatedly return.
- Repair costs are approaching the cost of a suitable replacement.
Age alone does not determine whether a faucet needs replacement. Its condition and availability of parts matter more.
Common Faucet Repair Mistakes
A simple repair can become frustrating when basic precautions are skipped.
Common mistakes include buying parts before identifying the faucet, forgetting to shut off the water, losing small components down the drain, overtightening fittings, and forcing corroded parts.
Another mistake is assuming every drip comes from a washer. Modern faucets often use cartridges or other sealing systems instead.
Correct diagnosis should come before disassembly whenever possible.
Check for Hidden Water Damage
A dripping spout is easy to see. Leaks beneath or around a faucet can be less obvious.
Inspect the cabinet below the sink for dampness, staining, swelling, peeling finishes, or musty odors.
Persistent moisture deserves attention because it can damage cabinets and surrounding materials.
For a broader inspection, see our guide on how to inspect your home for water damage. It explains where hidden moisture commonly appears and what warning signs to watch for.
Include Faucets in Routine Home Maintenance
A quick faucet inspection takes little time.
During your regular home checks, look for dripping, loose handles, mineral buildup, moisture under sinks, and changes in water flow.
Catching these signs early can make repairs simpler.
Our monthly home maintenance checklist includes plumbing and moisture checks that can help you identify small problems before they become more serious.
When Should You Call a Plumber?
Not every faucet problem needs professional repair. Still, stop the DIY work when the problem extends beyond a straightforward fixture repair.
Consider calling a plumber when:
- You cannot completely shut off the water.
- A valve begins leaking while you work.
- Pipes or connections appear badly corroded.
- Water is leaking inside a wall or cabinet structure.
- The faucet body itself is damaged.
- Replacement parts cannot be identified.
- The leak continues despite appropriate repairs.
- The repair requires plumbing modifications beyond your experience.
Knowing when to stop is part of responsible DIY maintenance.
Our guide on DIY vs professional repair can help you decide when a household repair is reasonable to handle yourself and when professional assistance makes more sense.
Final Thoughts
A dripping faucet often results from a worn seal, washer, O-ring, cartridge, or another small internal component. Finding the exact cause is more important than immediately replacing parts.
Start by identifying the faucet type and location of the leak. Shut off the water, work carefully, and use replacement components designed for your fixture.
A successful repair should stop the drip without requiring excessive force. If the leak persists or the plumbing shows signs of significant deterioration, professional inspection may be the safer and more practical choice.