Waterco's award winning MultiCyclone pre-filtration device. Centrifigul water filtration with no moving parts and no filter media to clean. Works with all sand , de or cartridge filters. Extends life of existing filter. Improves pool water circulation. Enhances performance of your cleaner. Cuts water consumption as it eases the load on the filter. Minimises backwash frequency. Easy maintenance. Suitable for new and existing installations. 2 year warranty