Pleated filters are widely used as effective surface filtration due to their excellent flow rates and high efficiency. Pleating allows the media to be tightly packed within the cartridge dramatically increasing surface area. Much of the media used in pleated cartridges has some depth characteristics aiding particle retention. The filters are used to remove Bacteria, Cryptosporidium, Viruses, Cysts, Fine Particulate and Silt. WRAS approved products.