The principle of osmosis is the basic characteristics of living cells, which are covered by semi-permeable membranes. It is a phenomenon when water molecules (solvents) penetrate through the semi-permeable membrane from the environment with lower solute concentration (purer) to the environment with higher solute concentration. Most intracellular processes take place thanks to the principle of osmosis.
For correct operation of REVERSE osmosis, surface of the membrane must be flushed regularly to prevent formation of a contiguous layer on the membrane, which would totally stop its operation. Filter with activated carbon is also necessary to remove chlorine, because chlorine damages the membrane. Last but not least, it is necessary to secure mechanical pre-filtration to prevent fine impurities from clogging the membrane. Input water is gradually flowing through the mechanical filter, activated carbon filter, reverse osmosis membrane and mineraliser, and the water finishes in a separate storage tank. The reverse osmosis system is equipped with a mineralisation level, which enriches potable water by a set of elements in the amounts recommended by the potable water standards (Ca, Mg, Na, K, CO3, SO4).