Pre Filters With Air Filter Style Cassette Type is a filtering device that removes large particles from the air before it reaches the main filter, including dust, hair, insects, pollen, and various fibers. A pre-filter, also known as a sediment filter, works to eliminate dirt, sand, rust, silt, and other large suspended particles and sediments from the water before it goes through the primary filtration system. It cleans the water and prepares it for further purification.

• Easy to use