A leaky faucet is one of the most common plumbing problems in any home. Even a slow drip can waste hundreds of gallons of water over time and increase your water bill. The good news is that most leaky faucets can be fixed in under 30 minutes with basic tools. In this guide, you’ll learn exactly what causes a faucet to leak and how to fix it step by step.
Why Your Faucet Is Leaking
Most faucet leaks are caused by worn-out internal parts that no longer create a tight seal.
The most common causes include:
- A worn washer
- A damaged O-ring
- A corroded valve seat
- Loose or worn cartridge components
Over time, water pressure and regular use wear these parts down, which leads to dripping from the spout or around the handle.
Step 1: Turn Off the Water Supply
Before taking anything apart, shut off the water supply valves under the sink. Turn them clockwise until they stop.
Turn the faucet on to release any remaining water pressure and to confirm the water is fully shut off.
Place a towel or small bucket under the sink to catch any leftover drips.
Step 2: Disassemble the Faucet Handle
Use a screwdriver to remove the decorative cap on the faucet handle if there is one. Underneath, you’ll usually find a screw holding the handle in place.
Remove the screw and gently pull the handle off. You may need to wiggle it slightly if it’s stuck.
Once the handle is removed, you’ll see the inner mechanism of the faucet. Depending on the type of faucet, this may be:
• A cartridge (a small cylindrical plastic or brass piece that slides in and out)
• A washer attached to a long metal valve stem
• A ball assembly (common in older single-handle faucets)
Take a photo before removing anything else. This will help you match the exact replacement part at the hardware store.
Step 3: Replace the Worn Washer or Cartridge
Carefully remove the cartridge, washer, or valve stem by unscrewing it or gently pulling it straight out.Inspect the rubber washer or O-ring. If it looks cracked, flattened, or worn down, it needs to be replaced.
Take the old part with you to a hardware store so you can match it exactly. Even small differences in size can prevent a proper seal.
Install the new part in the same position as the old one. Make sure it sits flat and secure before reassembling the faucet.
Step 4: Reassemble and Test the Faucet
Carefully put the handle and any removed parts back in place in the reverse order you removed them.
Tighten the screw securely, but avoid overtightening, which can damage the handle or internal components.
Turn the water supply valves back on slowly.
Turn on the faucet and check for leaks. If the dripping has stopped and there is no water leaking around the handle, the repair was successful.
If the Faucet Is Still Leaking
If the faucet continues to drip after replacing the washer or cartridge, consider the following:
• The replacement part may be the wrong size.
• The valve seat inside the faucet may be corroded.
• The cartridge may not be seated correctly.
Double-check that all parts are aligned properly and tightened securely. If the leak continues, the faucet itself may need to be replaced.
Final Thoughts
Fixing a leaky faucet may seem intimidating at first, but in most cases it’s a simple repair that costs less than $20.
Taking the time to replace a worn washer or cartridge can save water, reduce your utility bill, and prevent further damage over time.
With the right tools and a little patience, this is a repair almost any homeowner can handle.
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