How to Fix a Leaky Faucet: A Step-by-Step Guide for Every Faucet Type

Introduction

A faucet that drips all night is more than an annoyance. According to the EPA's WaterSense program, a faucet that drips once per second can waste more than 3,000 gallons of water a year. If the drip is hot water, you are also paying to heat water that goes straight down the drain.

The good news is that most drips come from a small, inexpensive part. Once you know your faucet type and where the water is escaping, learning how to fix a leaky faucet is a job most beginners can finish in about an hour.

This guide shows you how to identify your faucet, find the source of the leak, replace the right part, and troubleshoot if the drip comes back. You will also find maintenance tips and clear signs that it is time to call a plumber.

Why Faucets Leak in the First Place

Every faucet has a valve that opens and closes to control water flow. Inside that valve are rubber, plastic, or ceramic parts that wear out with use. The most common causes are:

Worn washers: A rubber washer presses against the valve seat to stop water. Over time it hardens, cracks, or flattens.
Damaged O-rings: These small rubber rings seal moving parts. When they fail, water leaks near the handle or at the base of the spout.
A corroded valve seat: The valve seat is the brass fitting the washer presses against. Corrosion or mineral deposits make it rough, so water slips past even a brand new washer.
A worn cartridge: In cartridge and ceramic disc faucets, the cartridge is the sealed unit that controls flow and temperature. When its seals wear out, the faucet drips.
Mineral buildup: Hard water leaves limescale on internal parts and prevents a tight seal.
High water pressure: Pressure above roughly 80 psi puts extra stress on seals and fittings.

Step 1: Identify Your Faucet Type

The first step in how to fix a leaky faucet is knowing which design you have, because each one uses different parts. Buying the wrong replacement is the most common beginner mistake.

Faucet Type	How to recoginze it	Where it usually leak	Part to replace	Difficulty
Compression	Two handles that you tighten down firmly to stop the water	Spout, or around the handle	Seat washer, stem O-ring, sometimes the valve seat	Easy to moderate
Cartridge	One or two handles that move smoothly, often lifting and turning	Spout or base of the spout	Cartridge or its O-rings	Moderate
Ball	One handle on a rounded cap, common on kitchen faucets	Spout, base, or under the handle	Inlet seats and springs, O-rings, sometimes the ball	Moderate to harder
Ceramic disc	One handle with a smooth, quiet motion and a wide cylinder body	Spout or base (less often than other types)	Ceramic disc cylinder or its rubber seals	Moderate

If you still cannot tell, look for a brand name on the handle or the back of the faucet, then search the model number online. You can also take a photo of the faucet and bring the old part to the hardware store so staff can match it.

Step 2: Find Where the Water Is Leaking

The location of the leak points to the failed part before you take anything apart.

Dripping from the spout: This usually means a worn washer, damaged valve seat, or tired cartridge seal.
Water around the base of the spout: The spout O-rings are likely worn. This is common on swivel spouts in kitchens.
Water around or under the handle: Look at the packing nut, the stem O-ring, or the handle seal.
Water under the sink: This may not be the faucet at all. Dry the area, wrap a dry paper towel around each supply line and connection, and watch for the spot that turns damp.

On a two handle faucet, you can also find the guilty side by closing one supply valve at a time. If the dripping stops after you close the hot valve, the hot side needs repair.

Tools and Materials You Need

Knowing how to fix a leaky faucet starts with gathering the right tools. Most are common household items:

Adjustable wrench and pliers
Flathead and Phillips screwdrivers
Hex (Allen) keys
Replacement parts matched to your faucet, such as seat washers, O-rings, a cartridge, or the manufacturer's repair kit
Plumber's silicone grease
Masking tape or a soft cloth to protect the finish
A flashlight, a towel, and a small bowl for parts
Penetrating oil for stuck parts and white vinegar for mineral buildup
Optional: a valve seat wrench and a cartridge puller

A note on lubricant: many plumbers prefer silicone grease over petroleum jelly, because petroleum products can break down some rubber seals over time. Check your faucet maker's instructions if you are unsure.

Prepare the Faucet and Stay Safe

A few minutes of preparation prevents most disasters.

Shut off the water. Close the hot and cold shut-off valves under the sink by turning them clockwise. If they do not exist or will not turn, close the main water valve for the house.
Release the pressure. Open the faucet to let the remaining water drain out.
Plug the drain. Place a rag or the stopper in the sink so small screws and clips cannot fall in.
Protect the finish. Wrap masking tape around the jaws of your wrench or pliers.
Take photos as you go. Pictures of each stage make reassembly much easier.
Keep parts in order. Lay them out on a towel in the order you remove them.

Safety: Wear safety glasses when prying off caps or loosening corroded parts, since mineral flakes can fly. Never force a stuck part with a hammer, because you can crack the faucet body. If you recently used hot water, let the faucet cool first.

How to Fix a Leaky Faucet by Faucet Type

The steps below follow the same pattern: remove the handle, remove the valve parts, replace what is worn, and reassemble. Use the section that matches your faucet.

Compression Faucet

This older style is the simplest to repair.

Pop off the decorative cap on top of the handle, remove the screw underneath, and lift off the handle.
Use an adjustable wrench to loosen the hex-shaped packing nut. Lift out the stem.
Look at the bottom of the stem. A rubber seat washer is held in place by a small brass screw. Replace it with an exact match, and replace the stem O-ring while you are there.
Shine a flashlight into the faucet body and inspect the valve seat. If it feels rough or pitted, remove it with a seat wrench and install a new one, or smooth it with a seat dressing tool.
Apply a thin layer of silicone grease to the threads and O-rings, then reassemble.
Turn the water back on slowly and check for drips.

Cartridge Faucet

Cartridge faucets are very common in bathrooms and showers.

Remove the handle cap and screw, then lift off the handle.
Remove the retaining clip or nut that holds the cartridge in place.
Take a photo showing which way the cartridge faces. Pull it straight up. If it is stuck, twist it gently or use a cartridge puller.
Check the O-rings on the cartridge and the faucet body. If the faucet drips from the spout, replace the whole cartridge.
Insert the new cartridge facing the same direction as the old one. A wrong orientation can reverse your hot and cold water.
Reassemble and test.

Cartridges are specific to the brand and model, so bring the old one to the store for matching.

Ball Faucet

Ball faucets have more small parts, so a repair kit is the easiest route.

Loosen the set screw with a hex key and remove the handle.
Unscrew the cap and collar. Taped pliers work well here.
Lift out the ball, the cam, and the cam washer.
Use needle-nose pliers or a small screwdriver to remove the rubber inlet seats and springs from the two openings in the faucet body.
Install the new seats and springs from the kit. Replace the ball if it is scratched or worn, and replace the spout O-rings if the base was leaking.
Line up the tab on the ball with the slot in the body, reassemble, and snug the adjusting ring. A slightly tighter ring often stops a leak at the handle.

Ceramic Disc Faucet

These rarely fail, but when they do, the cause is usually worn seals or mineral deposits.

Loosen the set screw and remove the handle and the decorative cover.
Unscrew the mounting screws and lift out the disc cylinder.
Pull off the small rubber seals on the bottom and replace them. Soak the cylinder in white vinegar to dissolve mineral buildup.
If the ceramic discs are cracked or chipped, replace the whole cylinder.
Reassemble. Many manufacturers advise turning the water back on with the handle in the open position, which protects the ceramic discs from sudden pressure.

Still Dripping After the Repair? Troubleshooting Guide

A faucet that keeps dripping after a repair is frustrating, but the cause is usually easy to pin down.

Compression faucet still drips after a new washer: The valve seat is probably damaged. Resurface it or replace it.
New cartridge still drips: It may be the wrong model, not fully seated, or installed in the wrong position. Remove it and double check the part number.
Leak at the handle after reassembly: The packing nut may be too loose, or an O-ring may be pinched. Tighten the nut gently or replace the O-ring.
Only one handle drips: Only that side's parts need attention. Leave the other side alone.
Weak flow along with the drip: Mineral buildup is likely. Soak metal and ceramic parts in white vinegar for one to two hours, scrub with an old toothbrush, and rinse. Keep vinegar off decorative finishes.
Stuck handle or stem: Spray penetrating oil, wait 15 minutes, then use a handle puller. Never hammer it.
Dripping plus banging pipes: Your water pressure may be too high. A pressure gauge that screws onto an outdoor spigot costs very little. Readings above about 80 psi are worth discussing with a plumber, who can install a pressure-reducing valve.
Everything is new and it still leaks: The faucet body may be corroded or cracked. At that point, replacement makes more sense.

Real-Life Examples

These are typical scenarios that show how the diagnosis works in practice.

Example 1: The hot-only drip. A two handle bathroom faucet drips steadily, but the drip stops when the hot shut-off valve is closed. The homeowner replaces the seat washer and stem O-ring on the hot side. The parts cost only a few dollars, and the faucet stays dry.

Example 2: The kitchen faucet that leaks at the base. A single handle kitchen faucet leaves a puddle around the swivel spout. The cause is dried out spout O-rings. A fresh pair, coated with silicone grease, solves it without replacing the cartridge.

Example 3: The drip that came back. A compression faucet keeps dripping even after a new washer. A look inside shows a pitted valve seat. Resurfacing the seat finally stops the leak.

Cost, Time, and Difficulty

Here is what to expect before you start:

Parts: Washers and O-rings typically cost a few dollars. Cartridges and repair kits often run from about $10 to $40, depending on the brand.
Time: Plan for 30 to 90 minutes on your first attempt.
Difficulty: Compression faucets are the most forgiving. Ball faucets have the most small parts.
Plumber cost: A service call usually costs much more than the parts. Ask for a written quote and compare it with your DIY budget.

If you are learning how to fix a leaky faucet for the first time, start with the cheapest parts first, such as O-rings and washers, before moving on to a full cartridge.

Repair or Replace? How to Decide

Before you decide between a repair and a new fixture, think about the age and condition of the faucet. Replacement is usually the better choice when:

The faucet is more than 15 years old and parts are hard to find
The body is pitted, cracked, or heavily corroded
The repair parts cost close to a new faucet
The finish is peeling or flaking
You have already repaired the same faucet more than once

A new faucet carrying the WaterSense label is also designed to use at least 20 percent less water than standard models, which is a nice bonus. If you decide to replace yours, our guide to the best kitchen faucet brands compares cartridge quality, warranties, and parts availability. For the bathroom, see the best bathroom sink faucets by style, finish, and budget.

Common Drain and Under-Sink Problems That Look Like Faucet Leaks

Sometimes the faucet is perfectly fine. Water under the sink often comes from the drain or supply connections. Check these before you buy parts.

Loose P-trap slip nut: The P-trap is the curved pipe under the sink. If water drips when the sink drains, hand tighten the slip nuts or replace the rubber washer inside.
Worn supply line connections: Tighten the connections gently. If they still seep, replace the flexible supply line.
Leaking pop-up stopper: A worn gasket lets water escape around the drain assembly. Replace the gasket. If you are not sure which type you have, our bathroom sink drain guide shows how to identify it in about a minute.
Slow drain: Hair, soap, and grease are the usual causes. Try a plunger first, then a drain snake, or remove and clean the trap. Our guide on how to clean a kitchen sink drain covers each step.
Bad smell from the drain: Run water to refill a dry trap, then clean away buildup inside the pipe.

Safety with drain cleaners: Chemical drain cleaners are harsh. Wear gloves and eye protection, ventilate the room, and follow the label exactly. Never mix products, because combining some cleaners, such as bleach and ammonia based products, can release toxic gas. Do not use a plunger on a drain that contains chemical cleaner, since it can splash back. Keep all cleaners away from children and pets.

Maintenance Tips to Prevent Future Leaks

Small habits keep faucets dripping free for years.

Check under the sink once a month for dampness. It is one of the quick checks on our monthly home maintenance checklist.
Clean the aerator every few months. Unscrew it, soak it in vinegar, and rinse away debris.
Turn handles gently. Cranking them shut wears out washers faster.
Operate each shut-off valve twice a year so it does not seize.
Replace worn parts at the first sign of a drip, before the valve seat is damaged.
Use a descaler or a water softener if you live in a hard water area.
Test your water pressure once a year.

Maintenance also makes the next repair easier, because well kept parts come apart without a fight. For more routines beyond the sink, see our home maintenance tips every homeowner should know.

When to Call a Plumber

Learning how to fix a leaky faucet pays off, but some jobs are best left to a licensed professional. Call a plumber if:

The shut-off valves are corroded or will not close
You see a leak inside a wall, or a stain on the ceiling below
Parts are seized or screws are stripped, and you risk breaking the fixture
The faucet keeps leaking even with correct new parts
Your water pressure seems too high
You are simply unsure, and a mistake could flood the room

Frequently Asked Questions

How do I stop a faucet from dripping?

Shut off the water, identify your faucet type, and replace the worn part. For compression faucets this is usually the seat washer. For cartridge, ball, and ceramic disc faucets, it is the cartridge, seats, or seals.

How much water does a leaky faucet waste?

The EPA says a faucet dripping once per second can waste more than 3,000 gallons a year. A hot water leak also adds the cost of heating that water.

Why is my faucet still dripping after I replaced the washer?

The valve seat is probably worn or pitted. A rough seat cannot seal against a new washer, so it needs to be resurfaced or replaced.

Can I fix a leaky faucet without shutting off the water?

No. Working on a faucet with the water on can cause a spray and a flood. Use the shut-off valves under the sink, or the main valve if those do not work.

How long does it take to fix a dripping faucet?

Most repairs take 30 to 90 minutes, depending on the faucet type and how stuck the parts are.

Final Verdict

A dripping faucet wastes water, raises your bills, and rarely fixes itself. The good news is that you now know how to fix a leaky faucet no matter which design you own. Identify the faucet type, find the source of the leak, replace the worn washer, O-ring, or cartridge, and check the valve seat if the drip returns.

Take your time, stay safe, and keep the old parts for matching at the store. With a little regular maintenance, your faucets should stay quiet and dry for years. If the job feels beyond your comfort level, a licensed plumber can finish it quickly and give you peace of mind.