Mineral scale in a faucet aerator can reduce flow and distort the stream. Cleaning means removing the aerator when the design allows it, preserving the order of its parts, dissolving compatible deposits, and rinsing before reassembly. EPA WaterSense recommends inspecting aerators for scale buildup and cleaning or replacing them as needed.
Protect the finish before loosening the aerator
Many aerators unscrew by hand; hidden models may require a special key. If a tool is necessary, protect the finish with a cloth and avoid crushing delicate coatings. Confirm thread direction and do not force a part that may be plastic.
Keep washers, screens, and restrictors in order
Take a photo during disassembly. Rinse out sand or particles with water and a soft brush. Do not enlarge openings with needles or remove a flow restrictor to compensate for blockage.
Soften scale with a compatible cleaner
White vinegar can help with mineral deposits on many parts, but check compatibility with finishes and materials. Soak only the necessary component for a reasonable period and rinse thoroughly before installation.
Replace an aerator that is damaged or remains restricted
If screens, threads, or seals are damaged, cleaning will not restore proper flow. Take the part or its measurements to choose a compatible replacement. If flow remains low with the aerator removed, the problem is upstream and needs a different diagnosis.
Sources
- U.S. Environmental Protection Agency WaterSense — Home Maintenance — Maintenance guidance for faucets, aerators, leaks, mineral buildup, and water efficiency.