Pure water machines use more complex multi-stage filter cartridges for water purification treatment, commonly using physical methods such as filtration, adsorption, and reverse osmosis, without adding any chemicals. Among them, the reverse osmosis pure water machine can easily separate solutes and ions in water through reverse osmosis membrane technology, filter out harmful substances such as bacteria, viruses, toxins, heavy metal ions, organic compounds, etc., and increase the oxygen content of water, making it weakly alkaline and more suitable for human absorption. The water quality treated by a pure water machine can meet the direct drinking standards of Europe and America, with a sweet and delicious taste.