Step-by-step fix
Step 1: Make sure the aerator is the likely cause
- Turn on the faucet and watch the flow pattern.
- Look for weak flow at this faucet only, sputtering, or water spraying off to one side.
- Compare hot and cold flow if your faucet has both.
- If other faucets in the house have normal pressure, the aerator is a good first place to check.
If it works: The problem appears limited to this faucet and the aerator is a reasonable first repair.
If it doesn’t: If several fixtures have low flow, or both hot and cold are weak throughout the house, troubleshoot the broader water supply issue before focusing on the aerator.
Stop if:- Water is leaking from under the sink, around the faucet body, or from a cracked spout.
- The faucet itself is loose, damaged, or badly corroded at the tip.
Step 2: Protect the faucet and remove the aerator
- Close the sink drain or place a rag over it so small parts cannot fall in.
- Wrap a soft cloth around the aerator at the faucet tip.
- Try turning the aerator counterclockwise by hand first.
- If it is stuck, use adjustable pliers over the cloth and turn gently until it breaks free.
- Set the parts down in the order you removed them.
If it works: The aerator is off the faucet and the parts are kept in order for reassembly.
If it doesn’t: If the aerator will not budge, apply a little more steady pressure with the cloth and pliers. Avoid squeezing hard enough to crush or deform the housing.
Stop if:- The aerator housing starts to deform, crack, or shave metal.
- The faucet spout twists or feels like it may break while you are trying to loosen the aerator.
Step 3: Take the aerator apart and rinse out loose debris
- Separate the screen, washer, and any small insert pieces carefully.
- Rinse each piece under running water to wash away sand, grit, and loose scale.
- Check the screen for packed debris and the washer for splits or distortion.
- Keep the parts laid out in the same direction they came apart.
If it works: Loose debris is removed and you can clearly see which parts need deeper cleaning or replacement.
If it doesn’t: If the screen is torn or the washer is damaged, replace the worn piece or the full aerator assembly instead of reinstalling it as-is.
Stop if:- The threads on the aerator or faucet spout are stripped or badly damaged.
Step 4: Soak and scrub away mineral buildup
- Place the aerator parts in a small bowl of white vinegar.
- Let them soak until the mineral scale softens enough to brush off.
- Use an old toothbrush or small nylon brush to clean the screen, housing, and inserts.
- Rinse everything well with clean water after scrubbing.
- Wipe the faucet tip and threads clean before reassembly.
If it works: The screen openings are clear, the parts are clean, and the threads are free of buildup.
If it doesn’t: If heavy scale still blocks the screen after soaking and brushing, replace the aerator rather than forcing a partly clogged one back into service.
Stop if:- You find cracks, missing pieces, or a screen that is separating from the housing.
Step 5: Reassemble and reinstall the aerator
- Put the internal parts back together in the same order and direction as before.
- Start the aerator onto the faucet threads by hand to avoid cross-threading.
- Tighten it hand-snug only.
- If needed, give it a very slight final snug with pliers over a cloth, but do not overtighten.
If it works: The aerator is installed straight, snug, and the faucet finish is not damaged.
If it doesn’t: If the aerator will not thread on smoothly by hand, back it off and start again. Misaligned threads can damage both the aerator and the faucet spout.
Stop if:- The aerator cross-threads, binds immediately, or will not seat squarely on the faucet.
Step 6: Test the faucet in real use
- Open the faucet slowly, then bring it up to normal flow.
- Watch for a smooth, even stream and listen for sputtering.
- Check around the aerator for drips while the water is running and again right after shutoff.
- Run both hot and cold if available to make sure the improvement holds in normal use.
If it works: Water flow is stronger and more even, with no leaking at the aerator after normal use.
If it doesn’t: If flow is still weak after cleaning, replace the aerator or continue troubleshooting the faucet supply lines, shutoff valves, or a wider pressure problem.
Stop if:- Water leaks from the faucet body or under the sink during testing.
- The faucet still has very poor flow even with the aerator removed, which points to a different blockage or supply issue.
FAQ
Why does a faucet aerator get clogged?
Usually from mineral scale, sand, rust, or other small debris collecting in the screen. Homes with hard water often see buildup faster.
Do I need to shut off the water to clean a faucet aerator?
Not usually. You are working at the faucet tip, so this is normally a surface maintenance job. Just make sure the faucet is off and the drain is covered.
What if I cannot remove the aerator by hand?
Wrap it with a soft cloth and use adjustable pliers gently. The cloth helps protect the finish. If the faucet spout starts twisting or the aerator deforms, stop before you cause damage.
Can I soak the aerator in vinegar overnight?
A vinegar soak is commonly used for mineral buildup, but you usually only need to soak it long enough for the scale to soften and brush off. Rinse the parts well before reinstalling them.
Should I replace the aerator instead of cleaning it?
Replace it if the screen is torn, the housing is cracked, the washer is damaged, or heavy buildup will not clear fully. A damaged aerator can keep causing poor flow or leaks.