Hyper-Logic - Sediment Pre-Filter - 20"x4.5" - poly spun - 5 micronHyperLogic 20" 5 Micron, Melt Blown Polypropylene, Ultra Fine Sediment Filters remove silt, rust, dirt and other assorted suspended solids from the water. When used on our Commercial Series RO systems, located in the gray housing under the RO, they offer OEM level protection to costly equipment such as the RO pump and help extend the life of RO membranes. Replacement should be perfomed monthly; sooner if Filter In Filter Out delta exceeds 10% These