Check that this guide fits your situation.
Use this guide when
One faucet with reduced flow while other fixtures work normally, and a removable aerator that turns by hand.
Do not use it for
Whole-home pressure loss, a leak, discolored water, a stuck aerator or an unfamiliar fixture.
Stop and get help if
- Several fixtures have low flow or pressure changed suddenly.
- Water is discolored or the faucet leaks.
- The aerator will not come off by hand without force.
Supplies
- Small towel
- Cup or shallow bowl
- Soft brush
Take it one step at a time.
- 01
Compare other fixtures
Run a nearby faucet briefly. Check whether the problem affects only this faucet, both hot and cold, or the whole property.
Why this mattersOne restricted outlet may be an aerator issue; widespread low pressure needs a different investigation. - 02
Check for a leak
Look around the faucet and under the sink from a dry area. Stop if you find active leakage.
Why this mattersLow flow with a leak should not be treated as a simple screen cleaning. - 03
Protect the small parts
Close the sink drain or place a towel over it. Set a bowl nearby for the aerator and its parts.
Why this mattersScreens and washers can be lost down the drain. - 04
Remove only if designed for hand access
Unscrew the aerator gently by hand according to the faucet maker’s instructions. If recessed, stuck or unfamiliar, stop rather than use force.
Why this mattersSome finishes and aerators require a specific key or method. - 05
Rinse and reassemble
Note the part order. Rinse visible grit from the screen with clean water and a soft brush, then reinstall by hand without overtightening.
Why this mattersTrapped particles can restrict flow at a single faucet. - 06
Test and compare
Run both hot and cold briefly and check for leaks. If flow remains weak, call and mention whether other fixtures are normal.
Why this mattersPersistent low flow may involve a valve, supply line or broader water service issue.
Yes → rinse the screen, reinstall and test both hot and cold.
No → do not force the fixture; request a plumbing assessment.
Check the result.
If it improved
Keep the aerator clean and watch for another sudden flow change.
If it did not
Call with a list of affected fixtures and whether the issue is hot, cold or both.
Source guidance
These public resources informed the safety boundaries and general steps. The exact equipment and conditions at your property may differ.