How to Fix a Leaky Faucet: The Professional DIY Guide to Save Water & Money

Leaks not only put stress on the drinking water system, but also send clean water to the wastewater treatment plant. Every small drip matters; a faucet leaking at just 10 drops per minute wastes over 300 gallons of water per year. Nationwide, household leaks waste nearly 900 billion gallons annually, which is enough water to supply 11 million homes.

By repairing some leaks yourself, you can reduce your impact on the environment and save money on your monthly bills! This guide is designed for beginners and typically takes between 2 to 4 hours to complete. Follow these easy steps to stop the waste and fix your leaky faucet for good.

Tools You May Need for the Job

Before we dive in, let’s make sure your workbench is ready. Having these items on hand will make the repair much smoother and prevent mid-project trips to the store. Most of these are basic household tools, but a couple of specialized items like the O-ring pick can really save you some frustration.

Adhesives: A roll of 1/2″ Teflon tape (for watertight seals) and a roll of 3/4″ masking tape.
Manual Tools: Flathead and Phillips head screwdrivers, an adjustable crescent wrench, Pliers, and a Hex key (Allen wrench).
Specialty Items: An O-ring pick (to help remove stubborn rubber rings) and Petroleum jelly (to lubricate moving parts).
Repair Materials: A Faucet Repair Kit containing replacement O-rings and washers.
The “Pro” Tip: Keep a hand towel nearby to place in the sink. This simple step prevents small screws or washers from falling down the drain.

Anatomy of a Faucet: Understanding the 12 Key Parts

A faucet is made of many parts working together. To make this guide easy to follow, we have numbered the parts below. We will reference these specific numbers in the repair steps, so take a moment to look over this list:

Decorative button: The small plastic cap on top of the handle.
Top screw: The screw hidden under the button that holds the handle on.
Faucet handle: The part you turn to start the water.
Top stem: The upper portion of the internal valve assembly.
Six-sided packing nut: The large nut that screws onto the stem to keep it secure.
Nylon washer: A hard plastic washer located under the packing nut.
Bottom stem: The lower half of the internal valve.
Plastic O-ring: A rubber-like ring that creates a waterproof seal.
Rubber washer: The flexible washer at the very bottom of the stem.
Bottom screw: The small screw that holds the rubber washer (9) in place.
Aerator: The mesh screen at the very end of the faucet spout.
The Faucet body: The main fixture itself.

8 Steps to Repair a Leaky Faucet Like a Pro

Fixing a leak doesn’t have to be complicated. If you follow these steps in order, you’ll save water and avoid a costly service call.

Step 1: Find the Leak & Identify the Source

Watch the leak closely to see exactly where the water is coming from. Is it leaking from the handle (3), the top stem (4), or the faucet spout (12) itself? Next, feel the temperature of the leaking water. Knowing if it’s the hot or cold side tells you which handle unit needs fixing, so you don’t have to take both apart.

Step 2: Shut Off the Water Supply

Before you loosen a single screw, shut off the water. Look for the supply valves under the sink and twist them to the “off” position. If you can’t find them or they won’t budge, shut off the master supply line for the entire house. Once the water is off, turn the faucet handles on to let any trapped water drain out.

Step 3: Prepare the Workspace

Protect your fixture by wrapping any shiny parts with a couple of layers of 3/4″ masking tape. This prevents your wrench from leaving scratches. Most importantly, place a towel in the sink to cover the drain. This simple trick stops small parts like the bottom screw (10) from falling down the pipe.

Step 4: Remove the Faucet Handle

If your faucet has a decorative plastic button (1) on top, use your flathead screwdriver to gently pry it off. Unscrew the top screw (2) hidden underneath and pull the faucet handle (3) off. If it’s stuck due to rust, take it off as gently as possible—never bang the handle, as you could break the inner workings.

Step 5: Remove the Stem or Cartridge

Beneath the handle is the top stem (4). Use your wrench to loosen the large six-sided packing nut (5). If it doesn’t move at first, try turning it the opposite way. Once loose, use your fingers to unscrew it completely and lift the entire stem assembly out of the faucet.

Step 6: Repair the Leak (The “Big Three” Solutions)

A) Fixing Handle Leaks: If water was leaking from the handle, cover the threads beneath the packing nut (5) with 1/2″ Teflon tape. If that doesn’t work, replace the nylon washer (6) underneath.
B) Fixing Stem Leaks: Unscrew the stem to find the plastic O-ring (8). Pinch it to get a grip, pull it off, and replace it with an exact match. Apply a little petroleum jelly to the new ring for a better seal.
C) Fixing Faucet Spout Leaks: On the bottom of the stem, unscrew the bottom screw (10) and replace the rubber washer (9). Make sure the new washer is the exact same size.

Step 7: Reassemble the Faucet

Rub a small amount of petroleum jelly on the threads of the bottom stem (7). Screw the assembly back into place and tighten it firmly with your wrench. Remove the masking tape and put the handle back on.

Step 8: Test Your Work

Turn your water supply back on and check the faucet. Run both the hot and cold water for a minute to ensure the flow is steady and the drips have stopped.

Common Causes of Faucet Leaks Why it Happens

If your faucet is dripping, it is usually because one of the internal “seal” components has reached the end of its life. Identifying the cause helps you buy the right replacement parts before you even take the handle off.

Worn Washers: This is the #1 cause of a dripping spout. Every time you turn the handle, the rubber washer (9) is pressed against the valve seat. Over time, friction and hard water cause it to tear or harden.
Loose or Damaged O-Rings: If you see water leaking from the faucet handle (3) itself, the plastic O-ring (8) has likely failed. These small rubber-like rings create the waterproof seal that keeps water inside the stem.
Valve Seat Corrosion: The valve seat is the connection between the faucet and the spout. If you have “hard water,” minerals can build up and corrode the metal, preventing the washer from making a tight seal.
Worn Cartridges: In modern faucets, the “cartridge” is the heart of the unit. If it becomes loose or worn, it can cause persistent leaks. Replacing a cartridge is usually simple and costs between $10–15 at most hardware stores.

Cleaning the Aerator (11)

Sometimes the problem isn’t a leak, but a weak or spraying water flow. This is usually caused by a dirty Aerator (11)—the small mesh screen at the very tip of your faucet spout.

In Miami’s water system, small particles of debris or mineral “scale” can get trapped in this screen. To fix this:

Unscrew the aerator by hand (or gently with a wrench and masking tape).
Rinse the mesh under water to remove debris.
If there is white crusty buildup, soak it in vinegar for an hour.
Screw it back on firmly. You’ll notice an immediate improvement in your water pressure.

Some Things You Can't Do Yourself: When to Call the Pros

While many faucet repairs are easy, others can be more complicated. As a professional, my best advice is to know your limitations. Trying to force a repair can sometimes lead to expensive property damage or a flooded kitchen.

Recognizing Complicated Issues: It might be time to call a professional plumber if you encounter any of the following:

High Water Pressure: If your faucets leak repeatedly, your home’s water pressure might be too high.
Broken Pipes or Fittings: If a pipe cracks or a fitting snaps while you are working, shut off the main water valve immediately and call for help.
Improper Installation: If the faucet was installed incorrectly by a previous owner, a simple washer replacement might not fix the root cause.
Corroded Valve Seats: If the internal metal of the faucet is pitted or worn away, the entire fixture likely needs to be replaced.

The Water Bureau is not responsible for any damage to your home or faucet due to faulty DIY repairs. If you have any concerns about making a repair safely, it is always better to call an expert.

Repair Assistance and Bill Adjustments

We believe that being proactive about leaks should be rewarded. If you have successfully fixed a leak or need help doing so, there are two important programs you should know about:

Water Leak Repair Assistance

Are you worried about the cost of a professional repair? Leak repair assistance is often available to income-qualified homeowners. These programs are designed to ensure that everyone in our community has a safe, leak-free home regardless of their budget.

Request a Bill Adjustment

Did you just fix a major leak? Let us know! Once you have repaired a leak that was causing high water usage, you may be eligible to have your water bill lowered. Many utility companies offer a one-time adjustment to credit you for the water lost during the leak. It never hurts to ask—fixing a leak can save you money on both the repair and your next utility statement.

Expert Support & Efficiency Services

Sometimes, a faucet repair is more complicated than it looks, or you might discover a bigger plumbing issue like a broken pipe or high water pressure once you start. If you have any concerns or simply want a professional to ensure your home is protected, we are here to help.

Our experienced team is available to handle everything from simple drips to full fixture replacements with upfront pricing and same-day service.

Related Guides & Resources

Fixing a leaky faucet is just the first step in making your home more water-efficient. To save even more on your monthly bills and reduce your environmental impact, explore our other helpful resources:

Fixing Toilet Leaks: Learn how to identify and repair a “silent” leak in your bathroom.
Free Water Efficiency Kit: Find out how to receive a complimentary kit to help lower your water usage.
Fix a Leak Week: Stay updated with the latest news and tips from our annual water conservation event.
Bill Adjustments: If you have successfully repaired a major leak, you may be eligible to have your water bill lowered.

Frequently Asked Questions About How to Fix a Leaky Faucet

How do I stop a faucet from dripping?

First, check that the handle is turned off completely. If the drip persists, it usually means internal parts like washers or O-rings are worn out. You will need to shut off the water supply, disassemble the handle, and replace the faulty components to stop the leak.

What is the most common cause of a leaky faucet?

The most common causes of a leaky faucet are damaged or worn rubber washers, gaskets, or O-rings. Over time, constant water pressure and mineral buildup from hard water can deteriorate these seals, preventing them from forming a watertight closure.

How to fix a leaking faucet step by step?

Fixing a leak is a straightforward process:

Shut off the water supply valves.
Remove the faucet handle.
Unscrew the stem or cartridge using a wrench.
Replace the old washer or O-ring with an exact match.
Reassemble the faucet and test your work.

Can I fix a leaky faucet without replacing it?

Yes! In most cases, you do not need to replace the entire faucet fixture. Replacing inexpensive parts like a washer (9) or an O-ring (8) can make an old faucet function like new again for a fraction of the cost.

Do I need a plumber to fix a leaky faucet?

If the leak is contained within the handle or spout, it is a Beginner-level DIY project that takes about 2–4 hours. However, if you notice water leaking inside the walls, or if the fixture is severely corroded, it is best to call a professional plumber to avoid property damage.

Can I fix a dripping tap myself?

Absolutely. If you have basic tools like a screwdriver and an adjustable wrench, you can fix a dripping tap yourself. Following a step-by-step guide helps ensure you identify the right parts and reassemble the fixture correctly.

Is it normal for water to drip from a faucet even with main water off?

It is normal for a small amount of water to drip immediately after turning the main valve off as the pipes drain. However, if the dripping continues for hours, it indicates that your main shut-off valve is not closing fully and may also need repair.

How to fix a faucet stem leak?

To fix a stem leak, remove the handle and use a wrench to loosen the six-sided packing nut (5). Lift out the stem and replace the plastic O-ring (8). Apply a small amount of petroleum jelly to the new O-ring before sliding it on and reassembling the unit.

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