How to fix a leaky faucet (compression and cartridge types)
How to identify your faucet type and the exact part to replace — for both common faucet styles.
Riley Brand
February 9, 2026
Step 1: Shut off water
Turn the valves under the sink (clockwise to close). Open the faucet to confirm water is off — should drain to nothing in 5 seconds.
Skipping this step ends with you on a YouTube tutorial about water damage.
Identify the faucet type
Two-handle compression faucet (older homes): drips because of a worn rubber washer at the base of the stem. Replacement washer: $1.
Single-handle cartridge faucet (most modern): drips because of a worn cartridge. Whole cartridge replacement: $20–40, takes 5 minutes.
The repair
Pry off the decorative cap on the handle. Unscrew the handle. Lift it off.
For compression: unscrew the stem, replace the washer at the bottom. For cartridge: pull cartridge straight up, push new one in the same orientation.
Reassemble in reverse. Turn water on slowly. Check for leaks before celebrating.
People also ask
How do I know which cartridge to buy?+
Take the old one to the hardware store. Or check the brand and model — it's usually printed under the handle.
What if it still drips after replacement?+
Either the wrong part, a damaged seat (check for nicks where the washer sat), or a faucet that's just done. Replacement faucets are $80–200.
Should I use plumber's tape?+
On threaded connections (like the supply lines), yes — wrap clockwise 2–3 times. On the cartridge itself, no.