How to Fix a Dripping Faucet (Step by Step)

A dripping faucet wastes water and money around the clock, but it's usually a simple, cheap fix with a worn part inside. The repair is four steps: shut off the water, replace the worn cartridge or washer, swap any cracked O-rings, and recheck the fittings before you turn it back on.

Why shut off the water first?

Always shut off the supply before you start — there are usually shutoff valves under the sink; if not, use the main. Then open the faucet to release pressure and plug the drain so small parts don't disappear. Skipping this step turns a small repair into a wet mess.

How do I replace the cartridge or washer?

Most drips come from a worn cartridge (in modern single-handle faucets) or a rubber washer (in older compression faucets). Take the handle apart, pull the part, and bring it to the store to match an exact replacement. Swap in the new part — that alone stops most drips.

What are O-rings and why replace them?

O-rings are small rubber rings that seal around the faucet's moving parts. When they crack or flatten, water seeps out around the base or spout. While you have the faucet apart, replace any worn O-rings — they're pennies and prevent a repeat repair. A little plumber's grease helps them seal.

What should I check before turning the water back on?

Recheck every fitting and connection is snug (not overtightened) before restoring water. Then turn the supply back on slowly and run the faucet, watching for leaks at the base and underneath. Catching a loose fitting now beats a drip under the cabinet later.

Watch the water bill

Small leaks add up — and show on the bill. Okoniq Property Hub tracks your utility bills so leaks stand out, with your home maintenance records. Related: fixing a running toilet.

Frequently asked questions

How much does a dripping faucet waste?

A steady drip can waste thousands of gallons a year. A part costing a few dollars usually stops it.

When should I call a plumber?

If the leak is inside the wall, the valve body is corroded, or the faucet keeps dripping after a cartridge swap, bring in a plumber.

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