The Aqualux Whole House Backwashing Sediment filter system uses revolutionary Nextsand media to effectively remove all sediment from your water supply. Able to filter down to the 3 - 5 micron range, Nextsand outperforms traditional multi-media filter beds both in filtration and flow. Nextsand media is non-sacrificial meaning it doesn't get used up in the filtration process. This system uses the exceptionally rugged and long-lived Fleck 5800SXT control valve.