Tools You'll Need
Step-by-Step
Close the drain
Put a rag or stopper in the sink so you don't lose any small parts down the drain.
Unscrew the aerator
The aerator is the small screen assembly at the tip of the spout. Try unscrewing by hand first. If stuck, use pliers wrapped in a cloth to protect the finish. Turn counterclockwise.
Note the order of parts
Lay out the parts in order: aerator body, screen, washer, flow restrictor. You'll reassemble in the same order.
Soak in vinegar
If there's white mineral buildup, soak the parts in white vinegar for 15–30 minutes to dissolve the scale.
Scrub the screen
Use an old toothbrush to scrub the screen and flow restrictor clean. Rinse with water.
Reassemble and test
Put the parts back in the same order and screw the aerator back on. Turn on the water — pressure should be restored. If it leaks at the aerator, tighten slightly.
WHEN TO STOP
- If the aerator is corroded and won't unscrew, don't force it — you can damage the spout.
- If cleaning the aerator doesn't restore pressure, the issue is elsewhere.
WHEN TO CALL A PROFESSIONAL
- The aerator is seized and won't unscrew — the spout may need professional attention.
- Cleaning the aerator doesn't fix low pressure at one faucet.
- Low pressure is throughout the house, not just one faucet.