Slip joint pliers
Use it for: To loosen a stuck aerator without much force.
Shop slip-joint pliersSimple faucet repair
How to Replace a Water Faucet Aerator
To replace a water faucet aerator, unscrew the old aerator from the faucet tip, match the replacement by thread type and size, then install the new aerator hand-tight and test the flow.
A clogged or damaged aerator is a common reason for weak water flow, sputtering, or a messy spray pattern at one faucet. This is usually a quick repair, but it helps to confirm the problem is only at that faucet before you swap the part.
Before you start: Match the thread size, thread type, and faucet compatibility before ordering.
Safety first
- Protect the sink drain so small aerator parts do not fall in.
- Use a cloth or rubber gripper between pliers and the faucet finish to avoid scratching it.
- Do not force a stuck or cross-threaded aerator hard enough to twist or crack the faucet spout.
Tools you may need
Soft cloth or rubber jar gripper
Use it for: To protect the faucet finish while loosening or tightening the aerator.
Shop rubber jar grippers
Small bowl or cup
Use it for: To hold the old aerator pieces so you can compare them to the replacement.
Shop small parts bowls
Old toothbrush
Use it for: To clean mineral buildup from the faucet threads before installing the new aerator.
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Step-by-step fix
Step 1: Confirm the aerator is the likely problem
- Turn on the affected faucet and note the flow.
- Check whether the low flow or uneven spray happens only at this faucet, not throughout the house.
- Look at the faucet tip for a screen insert or threaded cap where the water comes out.
- If the faucet has normal shutoff operation but weak, sputtering, or sideways spray at the outlet, the aerator is a good repair to try.
If it works: You have a faucet-specific flow problem that points to a clogged or damaged aerator.
If it doesn’t: If several fixtures have low pressure, troubleshoot the broader water supply issue before replacing the aerator.
Stop if:
- Water is leaking from the faucet body, handle, or under the sink instead of just flowing poorly at the tip.
- The faucet spout is cracked, badly corroded, or damaged enough that the aerator area may not hold a new part.
Step 2: Set up the area and remove the old aerator
- Close the sink drain or place a rag over it so small parts cannot fall in.
- Wrap a soft cloth around the aerator or use a rubber gripper for better grip.
- Try turning the aerator counterclockwise by hand while facing the faucet.
- If it is stuck, use slip-joint pliers over the cloth and apply gentle, steady pressure until it loosens.
- Remove the aerator and keep any washers, screens, or inserts together in a bowl.
If it works: The old aerator is off the faucet and the parts are saved for comparison.
If it doesn’t: If it will not budge, apply a little more steady pressure with protected pliers and avoid twisting the faucet spout itself.
Stop if:
- The faucet tip starts bending, cracking, or rotating in a way that suggests the spout may be damaged.
- The aerator appears fused by heavy corrosion and removal is damaging the faucet threads.
Step 3: Match the replacement before installing it
- Compare the old aerator and the new one side by side.
- Check that the diameter looks the same and that the threads match the faucet.
- Confirm whether your faucet uses male or female aerator threads by comparing how the old part fit at the spout.
- Make sure any included washer or screen is seated the same way as the old setup, if applicable.
If it works: You have a replacement aerator that matches the old one closely enough to install without forcing it.
If it doesn’t: If the new aerator does not start easily by hand or the size looks off, exchange it for the correct thread type and size.
Stop if:
- The faucet threads are stripped, cross-threaded, or too damaged to accept a new aerator safely.
Step 4: Clean the faucet tip and threads
- Use an old toothbrush or cloth to remove grit, scale, and mineral buildup from the faucet threads and outlet.
- Wipe the area clean so the new aerator can seat flat.
- Check that no old washer, broken screen piece, or debris is still stuck inside the faucet tip.
If it works: The faucet tip is clean and ready for the new aerator.
If it doesn’t: If buildup is still blocking the outlet, keep cleaning until the threads and seating surface are clear.
Stop if:
- You find broken metal, severe corrosion, or damaged internal parts inside the faucet tip.
Step 5: Install the new aerator
- Place any washer or insert into the new aerator if it is not already assembled.
- Start the new aerator by hand and turn it clockwise.
- Make sure it threads on smoothly without resistance or wobble.
- Tighten it hand-tight only, then give it a very slight snug with protected pliers if needed.
- Do not overtighten, since that can damage the threads or make future removal difficult.
If it works: The new aerator is installed straight and seated snugly at the faucet tip.
If it doesn’t: If it feels crooked or binds after a partial turn, remove it and start again by hand to avoid cross-threading.
Stop if:
- The aerator will not thread on straight even after rechecking the fit, which usually means the part or faucet threads do not match.
Step 6: Test the faucet in real use
- Open the cold water slowly, then fully, and watch the stream.
- Run the hot side as well if the faucet has both supplies.
- Check for a smooth, even flow and look around the aerator for drips.
- Let the water run for a minute, then turn the faucet off and back on a few times to confirm the repair holds.
If it works: The faucet has steadier flow, cleaner spray, and no leaking around the aerator after repeated use.
If it doesn’t: If flow is still poor, remove the aerator and recheck for the wrong fit, trapped debris, or a larger faucet or supply problem.
Stop if:
- Water leaks from the faucet body, under the sink, or another area unrelated to the aerator.
- The faucet still has very low pressure after a correct aerator replacement and other fixtures are also affected.
Replacement Parts
Find a water faucet aerator on Amazon
Match the thread size, thread type, and faucet compatibility before ordering.
As an Amazon Associate I earn from qualifying purchases. Repair Riot may earn a commission at no extra cost to you.
Verify the repair
- The faucet stream is more even and no longer sprays sideways or sputters at the tip.
- Water flow is improved at this faucet compared with before the repair.
- There are no drips around the new aerator while the faucet is running or after shutoff.
- The aerator stays snug after several on-and-off cycles.
FAQ
How do I know if the aerator is causing low water pressure?
If only one faucet has weak flow or a messy spray pattern, the aerator is a common cause. If several fixtures are affected, the problem is probably elsewhere in the plumbing system.
Can I clean the old aerator instead of replacing it?
Sometimes, yes. If the screen is only clogged with debris or mineral buildup, cleaning may help. Replace it if the screen is damaged, the housing is corroded, or cleaning does not restore normal flow.
Why won't the new aerator screw on?
The most common reasons are the wrong thread type, the wrong size, or cross-threading. Stop and compare the old and new parts closely before forcing anything.
Do I need pliers to install a water faucet aerator?
Usually no. Most aerators should start and tighten by hand. Pliers are mainly for a stuck old aerator or a very light final snug, always with a cloth to protect the finish.
What if the faucet still has low pressure after I replace the aerator?
Recheck for debris trapped behind the new aerator or damage at the faucet tip. If the problem affects more than one fixture, look for a larger water pressure or supply issue instead.