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How They Compare: Home Water Purifiers

Apr 22, 2008
Before buying a home water purifier, you should understand them. Purifiers are devices that will filter contaminants out of your tap water supply so you can drink pure, unadulterated water. When you compare home water purifiers, you'll quickly discover that there is a great variety of difference between the types, both in how they look and function and in what contaminants they filter out of your water. You should always purchase the one that works best for you.

Start to compare home water purifiers by examining their mechanisms of working. For instance, do they screw onto your faucet, or will you need to have them installed beneath your counter? Do you have the sort of hard water that may do better if you install a heavy-duty home water purifier to your main line, so that water softeners can reduce the lime in your water? Or do you simply want good clean drinking water? There are excellent water purifiers for every need and purpose, and some that even have extras like flavoring for drinking water.

Compare home water purifiers by the method used in filtering your water. Start with the two most common: activated carbon filters and reverse osmosis filters. Other filter types are the KDF-55 or the greensand iron filter; a fifth, the ultraviolet filter, is used primarily in hospitals and industrial settings. For most home water filters, reverse osmosis and activated carbon are the most likely types of filter. Each filter type has a somewhat different action on water and generally removes different contaminants.

Investigate activated carbon filters. This filter takes advantage of the very high reactivity of activated carbon to other chemicals; its slight positive charge attracts the slight negative charge of the contaminants in your water, and it draws contaminants to itself to eliminate impurities in the water. The two most common types of activated carbon filters are the granular activated carbon (GAC) and the powdered block carbon; both are excellent at purifying water, but you'll find the powdered block removes more contaminants and lasts longer. These filters eliminate radon, some heavy metals, some hydrogen sulfide, chlorine, volatile organic compounds such as pesticide, sediments, and bad tastes and odors.

While reverse osmosis purifiers are more involved to install, they also make much better purifiers, delivering water of bottled water grade. The osmotic barrier inside these purifiers is an ultrathin membrane that allows the passage of water, but not of contaminants, so that you wind up with pure water on one side and significantly more impure water on the other. Most reverse osmosis home purifiers consist of the purification system (with an activated carbon filter in addition to the osmotic filter) and a reservoir that delivers purified water directly to your tap. In addition to the contaminants removed by activated carbon, reverse osmosis purifiers remove bacteria, viruses, arsenic, chlorine, fluoride, nitrates, iron, and all heavy metals.

Never install a home water purification system unless you've checked the installation price, when and how you use your water filter, and what impurities you really need removed from your water. Once you determine this, you can start to enjoy clean pure water out of your own tap.
About the Author
Trent Barrett is a consultant who reviews water filters at Best-Home-water-Purifiers.com . You can visit their homepage to learn more about Home water Purifiers.
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