There are many ways to filter your drinking water, and one of the most popular ways is with a reverse osmosis system. How Does it Work? Reverse osmosis is a water filtration process in which water pressure pushes tap water through a membrane to remove impurities. There are many reverse osmosis systems out there but the Kinetico K5 Water Station is a state-of-the-art system, designed to solve even the toughest water quality challenges. The K5 has three stages, with each stage becoming more thorough. Stage 1, which is the prefilter stage, prepares the water for the reverse osmosis process. During