Filter pumps are devices used to circulate and clean water in various applications, such as swimming pools, aquariums, and industrial systems. They work by drawing water through a filter, which removes debris and contaminants, ensuring that the water remains clear and safe for use. These pumps are essential for maintaining water quality and can be powered by electricity or other energy sources. Regular maintenance of filter pumps is crucial to ensure their efficiency and longevity, as clogged filters can reduce performance and lead to water quality issues.