How to Fix a Leaky Faucet: A Step-by-Step DIY Guide

Introduction

A leaky faucet is one of the most common household nuisances. That constant drip can waste hundreds of gallons of water per year, drive up your utility bills, and keep you up at night. The good news? Most faucet repairs are surprisingly simple and require just basic tools and a little patience. This step-by-step guide will walk you through identifying the type of faucet you have, diagnosing the problem, and fixing it yourself. Whether you're dealing with a single-handle kitchen tap or a two-handle bathroom faucet, you can stop the drip in under an hour.

Determine Your Faucet Type

Before you start, identify the type of faucet you have. Common types include compression, ball, cartridge, and ceramic disc. Each has a different internal mechanism, but all share similar symptoms: dripping from the spout, leaks at the handle, or water seeping from the base. Knowing your faucet type helps you buy the correct replacement parts.

Compression Faucets

Old-fashioned, usually with separate hot and cold handles. They use rubber washers and can often be fixed by replacing the washer or the O-ring.

Ball Faucets

Common in kitchens, with a single handle that moves over a dome-shaped cap. They use a ball valve that controls water flow and temperature.

Cartridge Faucets

Single-handle units that use a removable cartridge. They are easy to repair by swapping out the cartridge.

Ceramic Disc Faucets

Modern, durable, with a single lever and two ceramic discs that slide against each other. They rarely need repair but may require cleaning if debris gets inside.

Step 1: Turn Off the Water Supply

Locate the shut-off valves under the sink. There should be separate valves for hot and cold water. Turn them clockwise to close. If there are no valves, turn off the main water supply to your house. Then open the faucet to drain any remaining water. For a single-handle faucet, run it in the middle position to drain both lines.

Step 2: Gather Your Tools and Parts

Typical tools include a flathead screwdriver, Phillips screwdriver, adjustable wrench, and pliers. Also, get a bucket and some towels. For parts, you may need a replacement cartridge, rubber washers, O-rings, or a complete faucet repair kit that includes these. The kit is inexpensive and comes with all the common sizes of washers and O-rings, saving you a trip to the hardware store.

Step 3: Remove the Handle

Use a screwdriver to remove the screw holding the handle—often hidden under a decorative cap. Popping the cap off with a small flathead screwdriver is fine. For stubborn screws, a magnetic screwdriver set is handy to prevent dropping screws into the drain. Once the handle is off, you'll see the stem or cartridge.

Step 4: Disassemble the Faucet

For compression faucets, unthread the retaining nut and lift out the stem. For cartridge faucets, pull out the cartridge with pliers or a cartridge puller. For ball faucets, remove the cap and the ball by lifting it out. For ceramic disc faucets, unscrew the cylinder and lift out the disc assembly. Always note the order of parts.

Step 5: Inspect and Replace Worn Parts

Check the rubber washer on the end of the stem (compression). If it's cracked or flattened, replace it. Check the O-ring around the stem. For cartridge faucets, inspect the cartridge for wear and replace it entirely. Ball faucets may need new springs and seals. Ceramic discs rarely wear but can accumulate grit; rinse them clean. If you're unsure, swapping in a new cartridge or full repair kit is best.

Step 6: Reassemble and Test

Put the faucet back together in reverse order. Tighten nuts and screws snugly—do not overtighten, as that can crack parts. Turn on the water supply gradually, check for leaks, and then run the faucet to ensure it operates smoothly. If it still drips, you may have missed a washer or the valve seat may need to be resurfaced, but this is rare for most DIY repairs.

Tips for Success

• Always place a towel over the drain to prevent losing small screws.
• Take a photo before disassembly to remember how parts align.
• If the handle is stuck, apply penetrating oil and wait 15 minutes.
• Use a cordless drill kit only for removing handle screws if needed—hand tools are usually safer to avoid stripping.
• For persistent drips, consider replacing the entire valve cartridge or the faucet itself.

Conclusion

Fixing a leaky faucet is one of the most rewarding DIY repairs—it saves water, lowers bills, and gives you a sense of accomplishment. With basic tools and a few replacement parts, you can tackle most faucet issues in under an hour. Always match the replacement parts to your faucet brand and model. If you need a complete starter set, a household tool kit includes most essential tools for this and many other home repairs. Remember, if the leak persists after repair, it may be time to call a plumber. But for most drips, you've got this!