7 stage reverse osmosis system Stage 1 - 1 Micron Sediment Filter Stage 2 - 1 Micron Carbon Block Stage 3 - 0.5 Micron U Carbon Block Stage 4 - Dow Filmtec Reverse Osmosis Membrane Stage 5 - Pro Series Cation Deionization Resin Stage 6 - Pro Series Anion Deionization Resin Stage 7 - Pro Mixed Bed Cation Deionization Resin
