by Trent Barrett
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.
Reverse osmosis purifiers are significantly more expensive and complicated to install, but they are significantly better purifiers as well. The osmotic membrane, a thin layer through which water (and nothing larger) can freely pass leaves impurities on one side, and delivers pure water on the other. These purifiers are not attached to faucets; instead, because they work slowly, they’re used in water reservoirs below your sink. Most of the best reverse osmosis purifiers run their water through a backup activated carbon filter before delivering the water to you. These purifiers eliminate many different contaminants: bacteria and viruses, arsenic, chlorine, fluoride, nitrates, iron, VOCs, sediments, heavy metals, some hydrogen sulfide, and bad tastes and smells.
Your choice in home water purifiers should be based on cost of installation, how you’ll be using your filter, and what the purifier removes. The purest water comes from the reverse osmosis filter, but both do an excellent job of delivering clean, pure-tasting water to your faucet.
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.