INNOVATIVE TECHNOLOGY: The innovative RO system is designed differently compared to the classic RO systems. Thanks to its innovative water-on-water tank, it takes up half the space under the sink, saves up to 9 tons of water per year, and even works in houses with low water pressure. Features: WHATS IN THE BOX: The Aquaphor RO-101S system comes complete with one Faucet/tap and 4 filters, 1 x K5 Pre-filter, 1x K2 Sorption treatment & filtration, 1 x R0-50S membrane cartridge, 1x K7M water conditioning and mineralization cartridge. Easy DIY click & turn cartridge replacement HOW IT WORKS: The K5 & K2 prefiltration cartridges deliver the most effective filtration of coarse particles up to 3 microns like sand or clay and protection of the RO50S RO membrane. The latter serves as a long-lasting shield against any toxic substances, heavy metals, pesticides, bacteria, and viruses LESS PLASTIC, LESS WASTE & LONGER APPLIANCE LIFE: With RO-101S there is enough fresh, pure and soft water for drink