Pureit Advanced Plus RO + MF + MP has 6 stages of purification system which ensures you get the best water that is safe and sweet. In the primary 3 stages, the water passes through the Pre-Sediment Filter, Pre-RO Carbon Filter and Mini Filter which removes coarse particulate impurities, dirt, chlorine, pesticides and other organic impurities. After which, the water flows through RO Membrane at high pressure where it removes TDS and other heavy metals. The fifth stage is the Micro-filtration Membrane (MF) which ensures the water is purified not once but twice. The final and sixth stage is the Post RO Carbon Filter which improves the taste of the water.