How a Reverse Osmosis Water Filter System Works

A reverse osmosis water filter system is a highly efficient means of purifying water for home use, often removing as much as 90% of man-made and biological contaminants. While the mechanism by which reverse osmosis achieves this bares similarities to those found in other less effective water purifiers, several key differences are responsible for this drastic boost in efficiency.

Reverse osmosis filtration systems employ several distinct filters to eliminate almost all contaminants. First, water is forced through a coarse-grained filter that removes sediment and other larger particles. In addition to purification, this step protects smaller and more precise filters from damage resulting from blockage by mineral deposits and other large waste.

Next, water is run through a membrane with tiny, microscopic pores. This stage eliminates most small contaminants, bacteria and even harmful ions, and is where the heart of the reverse osmosis process occurs.

Osmosis is the process by which solutions tend to achieve equal concentrations through a membrane. If, for instance, you joined two test tubes together, side by side,, filled one with pure water and another with salt water, then eventually both would contain the same concentration of salty water. This is because the salt molecules slowly move throughout the solution until their concentration is equal everywhere.

Imagine, then, that you hold a glass of water. Even though it contains a single substance, you can envision that glass as containing both water and contaminants. The goal of water purifiers is to remove those contaminants and leave behind pure water.

Returning to our previous example of joined test tubes, imagine that both are filled with salt water. Now, add a third test tube, joined by a very fine filter that traps salt, and apply pressure to the other tubes. Having nowhere else to go, the solution will move toward the empty tube, but because the filter blocks salt, the resulting water will be salt-free.

By applying pressure through this fine membrane, the water purifier forces pure water and contaminants apart. Just as osmosis results in a uniform solution, reversing the process results in two distinctly separate substances. While the contaminants remain behind in the filter, or are carried into the drains by waste water, the newly clean water passes through yet another filter designed to capture any remaining particles before pouring into your sink. This final filter removes organic substances often too small to have been caught in the membrane. Optional further stages subject the water to ultraviolet light, killing any microbes that may have passed through or around all previous filters.

Reverse osmosis units require substantially less maintenance than do other water purifiers. The various filters must generally be replaced twice annually, while the membrane is usually good for three to five years.

There is one major disadvantage to a reverse osmosis water filter system,, however. Very little pure water is actually produced, the remainder being discharged into the house's drainage. For every five gallons of purified water, 40 to 90 gallons of waste may be rejected. Since this excess contains many of the contaminants previously filtered away, it cannot be practically recovered by most residential systems. Even so, drinking, cooking and cleaning with water purified via reverse osmosis is one of the most substantial health improvements you can possibly make.

It is really important to protect your family’s health and well being. Don’t get caught with your shorts at your ankles. Rather invest in a home water purifier. It need not be the most expensive option. To enquire about different home water purification systems and locate the best water purifiers on the market contact Glacier .