... :Stage 1: 5micron PPF Cartridge which filter sand, mud, rust, sediment, etc in water.Stage 2: Granular Activated Carbon Cartridge which ... removes bad smell and filter organic sediment, chlorine etc in water.Stage 3: Block Activated Carbon Cartridge ... ,ro purifier without pump,reverse osmosis) RO style without pump sediment filters(RO,ro purifier without pump)