"Independently Developed By Vontron, The Ro Element Ulp1812 75 Is Designed For Treatment Of Low Salinity Water Resources Such As Tap Water, Well Water, Etc. Removes Impurities Such As Dissolved Salts, Viruses, Bacteria, Pesticides And Most Organic Compound Up To 0.0001 Micron.Replace Every 3 To 5 Years Depending On Water Quality And Usage."