Waterco Multicyclone 200377 40 SqFt MC16 Ultra Centrifugal Cartridge Filter with 2" Union 50 psi. Waterco’s award winning MultiCyclone is a brilliant pre-filtration device that works on the basis of centrifugal water filtration and is designed with no moving parts and no filter media to clean or replace. MultiCyclone pre-filters up to 80% of the filter’s incoming dirt load easing the workload of the swimming pool filter. As the MultiCyclone intercepts
more and more dirt, the flow rate remains unchanged.