HyperLogic 2.5" x 20" 5 Micron, Melt-Blown Polypropylene, Ultra-Fine Sediment Filters remove silt, rust, dirt and other assorted suspended solids from the water. Commonly used in our Industrial & Heavy-Industrial Series RO systems, located in the stainless steel housing prior 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 performed monthly; sooner if Filter In-Filter Out delta exceeds 10%. Formerly HyperLogic HL 13519