How Reverse Osmosis Water Filters Keep Your Water Clean
Author: TrentBarrett Total views: 7 Word Count: 558
A reverse osmosis water filter works by allowing water to pass through a thin membrane that does not allow other materials to pass. This means you wind up with clean, pure water on the using side of the membrane, while heavy metals, biological contaminants, and even chlorine remain on the other side of the membrane, filtering out and eventually flushed from the water filter's system. A reverse osmosis water filter eliminates almost all of several contaminants from your drinking water: arsenic, chlorine, fluoride, heavy metals, nitrates, sediments, iron, bacteria, viruses, bad tastes and odors, and some of your hydrogen sulfide and VOCs (an example: pesticides).
The reverse osmosis water filter is also referred to as a hyperfiltration system. That's because it is so very effective at removing contaminants from your water supply. It works by moving your water through a series of reservoirs, in which the clean water moves to the clean side of the filter, leaving behind the contaminants. The filter does not work through pressure; instead, water must move passively. This means that the filtration process is slower than you might find in other water filtration systems. A reverse osmosis water filtration system will require a large tank to be installed under your counter which will provide a drinking water reservoir. In most systems, you can expect to produce around fifteen gallons a day of bottled-quality water. If you're a bottled water fan, this will save you much more than the reverse osmosis filter will cost you.
There are two types of membranes typical to reverse osmosis water filters. A thin film composite (TFC) membrane is very good at removing contaminants, but it is also very susceptible to damage from chlorinated water supplies. An activated carbon pre-filtration system may need to be installed upstream of your TFC membrane to remove chlorine before it gets to the membrane. The other type of membrane is the cellulose triacetate (CTA) filter, which is also good at removing contaminants though inferior to the TFC, but does not have a problem processing chlorine. Make sure before installing your water filtration system that you have the membrane most appropriate to your water system; a damaged membrane can force you to replace your entire filtration system.
If you have a problem with biological contaminants, you should consider using not just a reverse osmosis water filter by itself, but also using an ultraviolet filter, as this filter is the most effective by far in removing biological contaminants without otherwise contaminating your water supply. So your perfect reverse osmosis water filter may need to have a total of three filters to be completely effective at cleaning your water: the activated carbon filter (which needs to be changed regularly), the osmosis filter, and the ultraviolet filter (which needs an electrical power outlet). With these three filters in your system, however, you can be assured of a tasty, reliable, and clean water supply for your home and family.
Your last concern with a reverse osmosis water filtration system: the amount of water used in producing your clean water. Each one gallon of clean water requires up to ten gallons of water, the remainder of which is flushed from the system. If this is a problem in your area, make sure that your contaminated water is redirected to your gray water reservoir, where it can be safely used to water your garden.
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About the Author
Trent Barrett is a consultant who writes for Best-Home-water-Purifiers.com. You can visit their homepage to learn more about Home water Purifiers.
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