A faucet filter is a device attached to a kitchen or bathroom faucet that purifies water as it flows through. It typically uses activated carbon or other filtration materials to remove contaminants, such as chlorine, lead, and sediment, improving the taste and safety of drinking water. These filters are easy to install and can be a cost-effective alternative to bottled water. Many faucet filters come with replaceable cartridges, which need to be changed periodically to maintain their effectiveness. They provide a convenient way to ensure clean water directly from the tap.