Some habitants in our planet have only access to weak acidic water because of geographical restrictions. According to nutritionist, long-term drinking of weak acidic water could do serious and irreversible harm to human bones, teeth, visibility and skins. This is because organs in our body need a weak-alkaline environment with a pH range of 7.35 to 7.45. Drinking safe and healthy water is essential to our health, as it helps every cell in our body work properly. Our under sink reverse osmosis system contains PPC, RO and T33 filter cartridges to perform five-stage filtration, and alkalization is carried out through the T33 filter cartridge with alkaline substances added.