Based on the process of osmosis, reverse osmosis also classifies as hyper-filtration, and it is the same process used by the human body to filter out toxic waste or contaminants. Impurities and particles are subject to removal from a solution by the passing of a high pressure through a half-absorbent membrane. The most common semi-permeable layer used nowadays is the gore-tex fabric, which contains an extremely thin plastic film sliced into billions of small pores, and which allows the passage of water, while ions or contaminants remain rejected.

Reverse osmosis involves a process that allows the membrane to clean itself, known as cross-flow. The process takes place when part of the liquid continues downstream, at the passing of liquid through the layer, sweeping the impure substances away. The process of reverse osmosis leaves behind any components with a molecular weight exceeding 150-250 Daltons. Such constant contaminant components are bacteria, salts and proteins. The invention of RO units has benefited the humankind immensely, with the possibility of purifying water even in rural areas where water pipes do not reach.

Drinking clean, pure and bacteria-free water is one of the most important factors that affect personal health. Doctors agree that tap water harm the human body because it is not 100% free of contaminants, and even dieticians recommend the use of purified water. People who own aquariums also have to use filtered water because most species of fish are very sensitive to common tap water and they do not survive a prolonged use of it. Therefore, the acquiring of RO units is a necessity for aquarium owners, and hospitals, universities and public aquariums.

The most common personal RO units do not use electricity or they do not need a pump because gravity powers them up, with the use of gravitational pressure. Filtered water is comparatively pure, odorless and colorless and it is free of dissolved minerals, making it a better choice for washing cars for example, because it does not affect the paint as hard water does. Purified water does not contain fluoride as tap water does and it has the special property of absorbing toxic substances from the body and eliminate them. Reverse osmosis water is classified as soft water, and it is free of arsenic, aluminum, sulfates, salts, detergents, radioactivity and most viruses. Thus, it makes a healthier choice for anyone.

The downside of using filtered water is that it has an acidic nature caused by the removal of alkaline minerals, and this water can be dangerous for the body system because it stripes calcium and other essential minerals from bone and teeth in order to neutralize its acidity. Nevertheless, in spite of this shortcoming, filtered water is becoming very popular amongst Americans, due to the benefits that outweigh the drawbacks.

Many families wonder about the quality of water they consume from the tap, either for cooking or drinking, and their concerns are accurate, as evidenced by different stories from the press. Investing in a RO system is the best way to make sure that your family drinks clean water because RO units are one of the most effective commercial systems available.

A large majority of people all over the globe use bottled water for drinking and cooking, but, taking into account the fact that one person's daily water intake should be around two liters, this can prove to be a very expensive choice. This means that the benefits of filtered water connect not only to health, but also to your financial status. Investing in RO units can prove to be more economical on a longer time interval, and the fact that parts are easy to find and do not need replacing very often is another advantage.