Which type of pool filter uses sand as a primary filtration medium?

A sand filter is specifically designed to use sand as its main medium for filtering water. This type of filter operates by water passing through layers of sand, where impurities and debris are trapped within the grains. The structure and size of the sand particles effectively provide a large surface area for capturing sediment, algae, and other unwanted materials from the pool water.

Sand filters are popular in both residential and commercial settings due to their ease of maintenance and relatively low operational costs. They typically require backwashing to clean the sand bed, which is a straightforward process that helps maintain ample filtering capability.

Cartridge filters rely on replaceable filter cartridges made from porous materials to trap particulates, while diatomaceous earth filters utilize powdered diatomaceous earth to provide a fine level of filtration, making them distinct from sand filters. Bag filters use a fabric bag to catch debris and are often easier to remove and clean but don’t utilize sand at all. Thus, the correct identification of the filter that employs sand highlights its unique functional design and application in water treatment systems.