Cartridge filters are a type of filtration system commonly used in various applications, including swimming pools, aquariums, and industrial processes. They consist of a cylindrical filter element made from materials like paper, polyester, or polypropylene, which captures dirt, debris, and other contaminants from liquids. The design allows for easy replacement and maintenance, making them a popular choice for both residential and commercial use. These filters work by allowing water to flow through the filter media, trapping particles as it passes. Over time, the filter can become clogged, reducing its effectiveness, so regular cleaning or replacement is necessary to ensure optimal performance.