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March 11th, 2009 at 11:13 pm
The ‘Pure Water Filters’ twin cartridge water filter is a standard carbon filter system.
These are the most common styles of countertop and under-the-sink systems (point of use). Granular carbon filters and carbon block systems use the same process of contaminant removal, adsorption, by which the contaminant bonds chemically or physically to the surface of the filter medium. Activated carbon is recognized by the U.S. EPA as the best available technology for filtering VOCs and THMs.
For best performance it is essential that a multi stage process be used to filter out a wide range of contaminants.
The Aquasana Water Filter is a multi-media block filtration system which utilizes all the benefits of activated carbon with several added advantages.
The “A” cartridge filters out sediment and turbidity first; tiny microscopic particles that can cause cloudiness and unpleasant taste and odor in water.
The “A” cartridge also filters out chlorine, the most concentrated and the most competitive chemical in our water.
This allows the following stages in cartridge “B” to focus on the more difficult contaminants like lead and synthetic chemicals.
The “B” cartridge is where the final stages of filtration take place. Lead is filtered out by a complex ion exchange process where lead ions are replaced with potassium ions.
The process is highly effective and also enhances the natural mineral balance of water. Potassium is one of the minerals that gives water a natural spring water taste and a neutral pH.
Next is the most challenging and possibly the most important stage, the adsorption of synthetic chemicals, like herbicides, pesticides and industrial solvents.
The “B” cartridge is also a 0.5 micron mechanical filter effective for chlorine resistant microscopic organisms like cryptosporidium and giardia, two common water borne parasites that can cause flu like symptoms for most, but can also be fatal to small children and the elderly.
For more information on comparing different types of water filtration, visit http://www.waterfiltercomparisons.com.au/