How to Clean a Faucet Aerator for Better Water Flow

Why it matters

A faucet aerator is a small mesh screen at the tip of your faucet nozzle. Its primary job is to mix air with the water flow, which creates a non-splashing stream and reduces the amount of water used without sacrificing pressure. Over time, calcium, lime, and sediment from your water supply build up in these tiny holes.

Cleaning your aerator matters because:

• Restores Water Pressure: Mineral buildup can reduce flow to a trickle, making it difficult to wash dishes or hands.
• Improves Water Quality: Debris and "scale" (hard water deposits) can break off and end up in your drinking glass.
• Protects Fixtures: Excessive buildup can create backpressure or cause water to leak from the sides of the faucet head, potentially damaging the finish over time.
• Saves Water: A clean aerator ensures the faucet operates at its designed flow rate (often 1.5 to 2.2 gallons per minute), preventing you from running the water longer than necessary due to poor pressure.

How often

In most homes, cleaning faucet aerators once or twice a year is sufficient. However, if you live in an area with "hard water" (high mineral content), you may need to perform this task every 3 to 4 months.

You should clean the aerator immediately if you notice:

• An uneven or "spraying" water stream.
• A significant drop in water pressure at one specific faucet.
• Visible white crusty deposits around the faucet tip.

What you need

Most aerators can be serviced with basic household items.

• Tools: Tongue-and-groove pliers (like Channel Locks) or an adjustable wrench.
• Protection: A thick rubber band or a piece of masking tape (to protect the faucet finish).
• Cleaning Agent: White distilled vinegar.
• Misc: An old toothbrush, a small bowl, and a sewing needle or safety pin.
• Replacement (Optional): A new aerator assembly (if the old one is corroded or the plastic is cracked).

Step-by-step

Follow these steps to safely remove, clean, and reinstall your aerator.

1. Close the drain

Before you touch the faucet, close the sink drain or place a washcloth over it. Aerator assemblies consist of several tiny parts (washers, screens, and discs) that are easily lost down the drain if dropped.

2. Remove the aerator by hand

Try to unscrew the aerator by turning it counter-clockwise (as if you are looking up at the faucet). If it hasn't been cleaned in a while, it may be stuck.

3. Use tools for stubborn aerators

If it won't budge by hand:

1. Wrap a thick rubber band around the aerator or apply two layers of masking tape. This prevents the pliers from scratching the chrome or matte finish.
2. Grip the aerator with your pliers.
3. Turn gently counter-clockwise. Do not squeeze too hard, as thin aerator housings can be crushed or bent out of round.

4. Disassemble and organize

Once removed, push your finger through the aerator to pop out the internal components. You will likely find:

• A rubber washer.
• A metal or plastic housing.
• A fine mesh screen.
• A plastic flow restrictor or mixer disc.

Keep them in the order they came out so you can reassemble them correctly.

5. Soak in vinegar

Place all the parts (except the rubber washer, which can be wiped clean) into a small bowl filled with white vinegar. Let them soak for 30 to 60 minutes. The acid in the vinegar will dissolve calcium and lime scale.

6. Scrub and clear holes

Take an old toothbrush and scrub the mesh screen and the plastic disc. If any holes remain plugged with grit, use a sewing needle or safety pin to carefully poke out the debris. Rinse everything thoroughly with clear water.

7. Reassemble and test

Put the parts back into the housing in the reverse order they were removed. Ensure the rubber washer is seated flat on top. Screw the aerator back onto the faucet by hand.

• Tip: Turn the water on slowly at first to check for leaks around the threads. If it leaks, tighten it just a quarter-turn more with the pliers.

When to call a pro

Cleaning an aerator is a 10-minute DIY task, but you should call a plumber if:

• The aerator is so corroded that it snaps off or crumbles when you try to remove it.
• Cleaning the aerator does not fix the low water pressure (this indicates a problem deeper in the pipes or the faucet cartridge).
• The faucet body itself is leaking from the base or handle.

Safety

• Internal Parts: Some modern "hidden" or "cache" aerators require a specific plastic key (usually provided with the faucet) to remove. Do not try to force these with pliers.
• Vinegar Handling: While white vinegar is safe, it can irritate the eyes. Rinse your hands after the soaking process.
• Hot Water: Ensure the faucet has been off for a few minutes before handling, as the metal housing can retain heat if hot water was recently used.

Cost

• DIY Cost: Effectively $0 to $5 (the cost of a cup of vinegar and a piece of tape).
• Replacement Parts: If the aerator is damaged, a replacement kit costs between $5 and $15 at any hardware store.
• Pro Cost: Hiring a plumber specifically for this task is not cost-effective, as most will charge a minimum service fee of $75 to $150. It is better to save this task for when a plumber is already at your home for a larger project.