To fix a leaky faucet at home, most people need basic plumbing tools, a matching faucet repair kit, replacement washers, O-rings, faucet cartridges, or valve stems, plus plumber’s tape, silicone plumber’s grease, a bucket, towels, and a good work light. The exact supplies depend on where the faucet is leaking: from the spout, handle, base, or under the sink.

For a simple drip from the spout, the most common supplies are replacement faucet washers, faucet seats, springs, or a matching cartridge. For a leak around the handle, you may need O-rings, packing nuts, stem washers, or cartridge seals. For under-sink leaks, you may need supply line connectors, pipe tape, or replacement water supply lines, but only after confirming the leak source.

The best beginner setup is not a huge plumbing kit. Start with an adjustable wrench, screwdriver set, hex key set, tongue-and-groove pliers, faucet repair parts, plumber’s tape, silicone plumber’s grease, towels, and a bucket. Buy specialty items like a basin wrench, cartridge puller, or seat wrench only if your faucet type actually requires them.

Why This Matters

A leaky faucet looks like a small problem, but the buying decision can get confusing fast. People often buy random plumbing supplies before they know what type of faucet they have. That wastes money and can leave them with parts that do not fit.

The real issue is matching the supply to the leak. A dripping spout is usually not solved by replacing the whole faucet supply line. A leak under the sink may have nothing to do with the faucet cartridge. A loose handle may need a simple hex key, while an old compression faucet may need a washer kit and seat wrench.

The smart approach is simple: identify the leak location, identify the faucet style, then buy only the faucet repair supplies that match the problem. That gives you a better chance of completing the repair without overbuying.

Before working on a faucet, shut off the water supply valves under the sink if they are available and confirm the water is off by opening the faucet. Keep a bucket and towels nearby. If shutoff valves are stuck, damaged, or missing, or if the leak involves hidden plumbing, it may be better to stop and get qualified help rather than forcing parts.

Best Product/Supply Categories to Consider

Adjustable Wrench

An adjustable wrench is one of the most useful tools for faucet repair. It helps loosen and tighten nuts, fittings, and small plumbing connections.

Who needs it: Most homeowners attempting a basic faucet repair should have one.

Features that matter: smooth jaw adjustment, comfortable handle, corrosion-resistant finish, and a size that fits under-sink spaces.

Basic vs. heavier-duty: A basic adjustable wrench is enough for occasional home faucet repairs. A heavier-duty version makes sense for frequent repair work, stubborn fittings, or facility maintenance.

Avoid: Oversized wrenches that are hard to use in tight spaces.

Screwdriver Set

A screwdriver set is needed for removing faucet handles, decorative caps, mounting screws, and some cartridge-retaining parts.

Who needs it: Almost everyone repairing a faucet.

Features that matter: both flathead and Phillips heads, comfortable grip, magnetic tips if preferred, and multiple sizes.

Basic vs. heavier-duty: A basic screwdriver set is enough for most homeowners. A higher-quality set is worth buying if you regularly repair fixtures, appliances, cabinets, or hardware.

Avoid: Using the wrong size screwdriver, which can strip small faucet screws.

Hex Key Set

A hex key set is often needed for faucet handle set screws. Many modern faucet handles use small hidden screws that require hex keys.

Who needs it: Anyone working on single-handle or modern-style faucets.

Features that matter: multiple sizes, clear size markings, and both standard and metric options if possible.

Basic vs. heavier-duty: A basic hex key set is usually enough. A stronger set is useful for repeated maintenance or stubborn set screws.

Avoid: Forcing the wrong size key into a set screw.

Tongue-and-Groove Pliers

Tongue-and-groove pliers are useful for gripping larger nuts, holding parts steady, and loosening fittings when a wrench does not fit well.

Who needs it: Homeowners working on older faucets, under-sink connections, or larger fittings.

Features that matter: adjustable jaw positions, non-slip handle, good jaw grip, and manageable size.

Basic vs. heavier-duty: A basic pair works for light repairs. A heavier-duty pair is better for older plumbing or repeated use.

Avoid: Gripping finished faucet surfaces directly. Wrap with a soft cloth if you need to protect the finish.

Basin Wrench

A basin wrench is a specialty tool for reaching nuts behind or underneath a sink, especially in tight spaces.

Who needs it: People removing or tightening faucet mounting nuts under the sink.

Features that matter: telescoping handle, pivoting jaw, comfortable grip, and enough reach for your sink depth.

Basic vs. heavier-duty: Do not buy a basin wrench unless you need to access hard-to-reach mounting hardware. For occasional use, a basic model is usually enough.

Avoid: Buying it for a simple cartridge or washer replacement if you are not working under the sink.

Faucet Repair Kit

A faucet repair kit can include common washers, O-rings, seals, springs, screws, or other small parts. Some kits are general, while others are designed for specific faucet types.

Who needs it: Anyone repairing a dripping or leaking faucet and unsure which small internal seal is worn.

Features that matter: faucet type compatibility, included part sizes, clear labeling, and whether it includes the specific washer, O-ring, or spring you need.

Basic vs. heavier-duty: A basic faucet repair kit is fine for common home repairs. More complete kits make sense for property managers, maintenance teams, or anyone servicing multiple faucets.

Avoid: Buying a random universal kit and assuming every part will fit.

Faucet Washers

Faucet washers are commonly used in compression-style faucets. A worn washer can cause dripping from the spout.

Who needs it: People repairing older two-handle compression faucets.

Features that matter: correct size, correct thickness, durable rubber or compatible material, and match to the existing washer.

Basic vs. heavier-duty: Basic faucet washers are usually enough for normal home use. Bulk assortments are better for frequent repairs.

Avoid: Guessing the size without comparing the old washer.

O-Rings

O-rings are small round seals used around stems, cartridges, and faucet bodies. They help prevent leaks around handles or moving parts.

Who needs it: Anyone dealing with leaks around the handle, base, or internal faucet assembly.

Features that matter: correct diameter, correct thickness, water-compatible material, and fit with the faucet design.

Basic vs. heavier-duty: A small O-ring assortment is useful for homeowners. Larger assortments are better for maintenance use.

Avoid: Stretching an O-ring too far or using one that is close but not correct.

Faucet Cartridge

A faucet cartridge controls water flow and temperature in many modern faucets. A worn or damaged cartridge can cause dripping, poor shutoff, or handle leaks.

Who needs it: People with cartridge-style faucets, especially single-handle or newer two-handle models.

Features that matter: exact faucet compatibility, hot/cold orientation where relevant, seal quality, and included retaining clips or parts.

Basic vs. heavier-duty: There is no good “almost fits” option here. Buy the correct faucet cartridge for the faucet type. For frequent repairs, keeping common replacement cartridges on hand may make sense.

Avoid: Buying by appearance only. Similar cartridges can be different sizes.

Valve Stem

A valve stem is common in some two-handle faucets. It works with washers and seals to control water flow.

Who needs it: People repairing older or two-handle faucets where the stem is worn, corroded, or damaged.

Features that matter: correct length, thread type, hot/cold match, and compatibility with the faucet body.

Basic vs. heavier-duty: A standard replacement valve stem is usually enough for home repair. Commercial maintenance teams may keep common valve stems in inventory.

Avoid: Replacing only the washer if the valve stem itself is damaged.

Faucet Seats and Springs

Faucet seats and springs are small internal parts used in some faucet designs. Worn seats and springs can cause dripping from the spout.

Who needs it: People repairing faucets that use this seal system.

Features that matter: correct size, compatible material, and kit compatibility.

Basic vs. heavier-duty: A basic seats and springs kit is enough for most home repairs. Bulk packs are useful for repeated maintenance.

Avoid: Replacing only one small part when the matching seat and spring are both worn.

Plumber’s Tape

Plumber’s tape, also called thread seal tape, is used on threaded connections where appropriate. It helps seal some threaded plumbing joints.

Who needs it: People working with threaded fittings, shower arms, some supply connections, or threaded adapters.

Features that matter: tape width, density, and compatibility with the connection type.

Basic vs. heavier-duty: A basic roll of plumber’s tape is enough for occasional home use. Larger rolls or higher-density tape make sense for frequent plumbing tasks.

Avoid: Using plumber’s tape on compression fittings where it is not needed. It is not a fix for every leak.

Silicone Plumber’s Grease

Silicone plumber’s grease helps lubricate O-rings, seals, and moving faucet parts during reassembly.

Who needs it: Anyone replacing O-rings, cartridges, or rubber seals.

Features that matter: water-safe silicone formula, small container size, and easy application.

Basic vs. heavier-duty: A small tube is enough for homeowners. Larger containers are useful for maintenance teams.

Avoid: Using general-purpose grease that may not be suitable for plumbing seals.

Replacement Water Supply Lines

Replacement water supply lines connect shutoff valves to the faucet. They are only needed if the leak is coming from the line, connector, or under-sink connection.

Who needs it: People with visible leaks under the sink from the supply line or connector.

Features that matter: correct length, correct connector size, flexible design, and compatibility with the faucet and shutoff valve.

Basic vs. heavier-duty: A standard braided water supply line is usually enough for home sinks. Heavy-duty or commercial-grade options may be worth considering for high-use restrooms or facility settings.

Avoid: Replacing supply lines when the leak is actually from the faucet cartridge or handle.

Bucket and Towels

A bucket and towels are simple but important. Even small faucet repairs can release trapped water.

Who needs it: Everyone doing faucet repair.

Features that matter: low-profile bucket for under-sink use, absorbent towels, and enough coverage for cabinet floors.

Basic vs. heavier-duty: Basic household towels and a small bucket are enough for most repairs. Facilities may want dedicated water cleanup supplies.

Avoid: Starting the repair without anything to catch water.

Work Light or Flashlight

A work light or flashlight helps you see under the sink, inside cabinets, and around small faucet parts.

Who needs it: Anyone working in a cabinet, under a sink, or in a dim bathroom or kitchen.

Features that matter: hands-free option, compact size, stable base, and enough brightness for close work.

Basic vs. heavier-duty: A basic flashlight works for simple repairs. A hands-free LED work light is better for under-sink work or repeated repairs.

Avoid: Using poor lighting when removing tiny screws, clips, or seals.

Cleaning Supplies

Basic cleaning supplies help remove mineral buildup, grime, and old residue before reassembly. Useful items include cleaning cloths, a small scrub brush, and mild household cleaner suitable for the surface.

Who needs it: Anyone repairing an older or dirty faucet.

Features that matter: non-abrasive materials, surface compatibility, and easy cleanup.

Basic vs. heavier-duty: Basic cleaning cloths and a small brush are enough for most faucet work. Heavier-duty janitorial cleaning supplies may be useful for commercial restrooms or heavily used sinks.

Avoid: Scratching finished faucet surfaces with abrasive pads.

Safety Glasses and Gloves

Safety glasses and work gloves can help protect your eyes and hands from small debris, sharp edges, cleaning residue, or awkward under-sink work.

Who needs it: Homeowners working under sinks, handling old fittings, or using tools in tight spaces.

Features that matter: comfortable fit, clear visibility, grip, and flexibility.

Basic vs. heavier-duty: Basic safety glasses and light work gloves are enough for most home repairs. Heavier-duty cut-resistant gloves may be useful for facility teams or rough plumbing work.

Avoid: Using bulky gloves that make it hard to handle small parts.

How to Choose

First, identify where the leak is coming from. A drip from the spout points toward internal parts such as washers, faucet cartridges, valve stems, seats, or springs. A leak near the handle may point toward O-rings, packing nuts, or cartridge seals. A leak under the sink may involve water supply lines, compression fittings, or faucet mounting connections.

Second, identify the faucet type. Compression faucets often use faucet washers and valve stems. Cartridge faucets use faucet cartridges. Some faucets use seats and springs. Ceramic disc faucets often need very specific replacement cartridges or seals.

Third, match the part before buying. If possible, remove the old washer, O-ring, cartridge, or valve stem and compare it carefully. Size, shape, and connection style matter. A part that looks close may still leak if it is not the correct fit.

Fourth, decide whether you need tools or parts. If the faucet is easy to access, you may only need an adjustable wrench, screwdriver set, hex key set, and replacement seals. If you are working under the sink, a basin wrench, work light, and bucket become more useful.

Fifth, think about frequency. A homeowner fixing one faucet can buy basic tools and individual replacement parts. A landlord, business owner, or facility manager may get better value from faucet repair kits, O-ring assortments, washer assortments, bulk plumber’s tape, and durable plumbing hand tools.

Common Mistakes to Avoid

One mistake is buying the replacement part before identifying the faucet type. Faucet cartridges, washers, valve stems, and O-rings are not interchangeable.

Another mistake is using plumber’s tape as a universal leak fix. Thread seal tape is useful for certain threaded connections, but it does not repair worn internal faucet parts.

A third mistake is overtightening fittings. Too much force can damage threads, crush seals, or make future repairs harder.

Another common mistake is ignoring the shutoff valves. If the shutoff valves under the sink are stuck, leaking, or unreliable, the faucet repair can become more complicated.

Some buyers also purchase professional specialty tools too early. A cartridge puller, seat wrench, or basin wrench can be useful, but only when the job actually needs it.

Finally, many people forget cleanup and lighting. A bucket, towels, and work light are cheap compared with the frustration of working blind or dealing with water inside a cabinet.

Recommended Starter Setup

For Beginners and Homeowners

A practical beginner faucet repair setup includes:

• Adjustable wrench
• Screwdriver set
• Hex key set
• Tongue-and-groove pliers
• Faucet repair kit
• Replacement washers
• O-ring assortment
• Plumber’s tape
• Silicone plumber’s grease
• Bucket
• Towels
• Work light
• Safety glasses

This setup is enough for many common faucet leaks, especially handle leaks and simple spout drips.

For Business Owners or Facility Managers

A more complete maintenance setup may include:

• Plumbing hand tool set
• Basin wrench
• Cartridge puller
• Seat wrench
• Washer assortment
• O-ring assortment
• Faucet cartridge assortment
• Valve stem replacements
• Replacement water supply lines
• Bulk plumber’s tape
• Water cleanup supplies
• Disposable gloves
• LED work lights

This makes more sense when maintaining multiple sinks in offices, restaurants, shops, rental units, schools, clinics, or commercial restrooms.

When to Upgrade

Upgrade to commercial-grade or heavier-duty plumbing tools if you repair faucets often, maintain multiple properties, or work in a business with frequent sink use. Better tools can be more comfortable, more durable, and less frustrating over repeated jobs.

Choose bulk faucet repair supplies if you service several similar faucets. Bulk washers, O-rings, seats and springs, and plumber’s tape can save time when the same parts are used regularly.

Choose heavier-duty water supply lines for high-use sinks, commercial restrooms, or locations where downtime is costly. Just make sure the connector sizes and lengths are correct.

Consider a basin wrench, cartridge puller, or seat wrench when basic tools cannot reach or remove the part. These tools are useful, but they are not necessary for every homeowner.

Do not upgrade just because a product looks more professional. For one simple home faucet leak, basic tools and the right replacement part are usually the smarter buy.

Final Recommendation

For most home faucet leaks, buy the essentials first: an adjustable wrench, screwdriver set, hex key set, tongue-and-groove pliers, faucet repair kit, replacement washers, O-rings, plumber’s tape, silicone plumber’s grease, bucket, towels, and a work light.

If the leak is from the spout, focus on the correct washer, cartridge, valve stem, or seats and springs. If the leak is around the handle, focus on O-rings, packing parts, or a matching faucet cartridge. If the leak is under the sink, inspect the water supply lines and fittings before buying faucet internals.

The best purchase is not the biggest plumbing kit. It is the smallest complete set of faucet repair supplies that matches your faucet type, leak location, and repair frequency..

FAQ

What is the most common supply needed for a leaky faucet?

For many basic faucet leaks, common supplies include replacement washers, O-rings, or a matching faucet cartridge. The right part depends on the faucet type and where the leak is coming from.

Do I need plumber’s tape to fix a leaky faucet?

You may need plumber’s tape for certain threaded connections, but it does not fix every leak. If the leak is from the spout or handle, the problem is more likely a washer, O-ring, valve stem, or cartridge.

What tools do I need to replace a faucet cartridge?

You may need an adjustable wrench, screwdriver set, hex key set, tongue-and-groove pliers, and possibly a cartridge puller if the cartridge is stuck. Always match the faucet cartridge carefully.

Should I buy a full faucet repair kit?

A faucet repair kit is useful if it matches your faucet type or includes the parts you need. For one simple repair, buying the exact washer, O-ring, or cartridge may be cheaper.

When do I need a basin wrench?

You need a basin wrench when you must reach faucet mounting nuts or fittings behind the sink where regular tools do not fit. It is not always needed for simple handle or cartridge repairs.

Do I need to replace the water supply lines?

Only replace water supply lines if they are leaking, damaged, corroded, too short, or being disconnected during a larger repair. A dripping faucet spout usually does not require new supply lines.

What should I buy first for a beginner faucet repair?

Start with an adjustable wrench, screwdriver set, hex key set, O-ring assortment, replacement washers, plumber’s tape, silicone plumber’s grease, bucket, towels, and the exact faucet part your leak requires.