How to Stop a Leaking Faucet Yourself

Understanding Common Faucet Leak Types

Before you begin fixing a leaky faucet, it helps to understand what type of leak you're dealing with. Different faucet designs leak in different ways, and identifying your leak pattern will guide your repair approach.

A dripping faucet from the spout is the most common type of leak. This typically means the internal seals that stop water flow have worn down. According to the U.S. Environmental Protection Agency, a single faucet dripping at one drop per second wastes more than 3,000 gallons of water annually. That's equivalent to taking nearly 200 showers. If you're seeing steady drips from the spout even when the handle is fully off, the problem usually lies with a worn washer, O-ring, or cartridge inside the faucet body.

A leak around the base of the faucet where it connects to the sink is a different problem. This leak suggests that the seal between the faucet and sink has failed. These leaks can damage your cabinet or countertop if left unaddressed, sometimes causing rot or mold growth within weeks.

Handle leaks occur when water drips from under the handle itself. This indicates that the packing nut—the part that holds the handle in place—has loosened or the packing material inside has degraded.

• Spout drips: worn internal seals or cartridges
• Base leaks: failed connection seal between faucet and sink
• Handle leaks: loose packing nut or degraded packing material
• Hot water leaks under the sink: cracked pipes or loose connections

Practical Takeaway: Spend a few minutes observing where exactly the water is coming from. Is it dripping steadily from the spout tip? Is water pooling under the sink? Is it seeping around the handle base? This observation will determine which repair method you need and what parts to purchase.

Gathering the Right Tools and Materials

You don't need an extensive tool collection to repair most household faucets. In fact, many homeowners can complete faucet repairs with items already in their garage or kitchen drawers. Having the correct tools on hand prevents frustration and prevents damage to your faucet.

Basic tools for faucet repair include an adjustable wrench, which costs $8-15 and adjusts to fit different sized nuts and bolts. A screwdriver set with both Phillips and flat-head options runs $10-20. An Allen wrench set, used on many modern faucets, typically costs $5-10. A flashlight or headlamp helps you see under the sink, costing $15-30. Some people use their phone's flashlight feature instead. Plumber's grease or silicone-based lubricant ($5-8) prevents parts from sticking during reassembly.

Replacement parts vary depending on your faucet type. A universal faucet washer kit containing multiple sizes costs $3-8. Cartridge replacements range from $15-75 depending on the faucet brand. O-ring assortment kits run $5-12. Packing material or packing string costs $2-5. Plumber's tape (also called Teflon tape or thread seal tape) costs $3-6 per roll.

Before purchasing replacement parts, identify your faucet brand. Look for markings on the faucet body itself, or check any documentation from when your faucet was installed. Common brands include Moen, Kohler, Delta, Pfister, and Grohe. Having your specific faucet model helps ensure you buy compatible parts. Many hardware stores keep common replacement cartridges behind the counter or online retailers ship them within 2-3 days.

• Adjustable wrench: $8-15
• Screwdriver set: $10-20
• Allen wrench set: $5-10
• Flashlight or headlamp: $15-30 (or use phone flashlight)
• Faucet washer kits: $3-8
• Cartridge replacements: $15-75
• Plumber's tape: $3-6

Practical Takeaway: Visit a hardware store with your faucet brand and model number (or take a photo of the faucet). A staff member can help you identify which replacement parts you need. This 10-minute consultation prevents buying wrong parts and ensures your repair succeeds.

Turning Off Your Water Supply and Preparing Your Workspace

Before touching any part of your faucet, you must turn off the water supply. This prevents water from spraying everywhere and allows you to work without rushing. Most homes have shut-off valves under the sink specifically for this purpose.

Look under your sink and locate the small valves attached to the hot and cold water lines. These are typically oval or round knobs about the size of a quarter. If fixing a spout leak, turn off both valves by rotating them clockwise. If fixing only the hot water side, turn off just the hot water valve. Give the valves a full turn or two until they stop—don't force them, as forcing can crack old valves.

After turning off the valves, turn on the faucet to release any remaining water pressure inside the pipes. You'll see water drain out and the flow will stop as the lines depressurize. This step is crucial because water will still be in the pipes even after the valves are shut off.

Now prepare your workspace. Place towels or a bucket under the area where you'll be working. Older pipes may drip residual water, and even a small amount can dampen your cabinet floor. Clear out any cleaning supplies, tools, or items stored under the sink so you have full access to work. Good lighting is essential—position your flashlight or headlamp so you can see what you're doing without awkward angles.

If your home doesn't have shut-off valves under the sink, locate your main water shut-off valve. This is typically in your basement near the water meter, in a crawl space, or outside your home near the foundation. Turning off the main valve stops water throughout your entire house, which is less convenient but still necessary if local shut-offs don't exist.

• Locate shut-off valves under the sink
• Turn both valves clockwise until they stop
• Open the faucet to release water pressure
• Place towels and buckets under the work area
• Clear storage items from under the sink
• Position lighting so you can see clearly
• Note the position of the shut-off valves for future reference

Practical Takeaway: Spend five minutes locating and testing your shut-off valves before you have an emergency. Write down their location or take a photo. This preparation means you won't waste time searching for valves when you need to stop a gushing pipe or complete a repair.

Repairing a Dripping Faucet Spout

A dripping spout is the most common faucet problem and often the most straightforward to fix. The solution depends on whether your faucet has washers, O-rings, or a cartridge mechanism inside.

For compression faucets (the older two-handle type with separate hot and cold handles), the leak usually comes from a worn washer. After turning off the water and opening the faucet to release pressure, use your screwdriver to remove the handle. You may need to pry off a decorative cap first to access the screw. Once the handle is off, you'll see the stem nut. Use your adjustable wrench to loosen it by turning counterclockwise. Pull the stem straight out of the faucet body. At the base of the stem, you'll find a small screw holding a rubber washer in place. Remove this screw and replace the washer with an identical new one from your washer kit. Reassemble in reverse order, turning the stem nut clockwise