Are you considering a whole house water filtration system for your home? They are, without a doubt, the best way to provide good, clean water everywhere in your house, with ease and convenience. In this article, we will take a look at some newer technology in comparison with the old, discuss some pluses and minuses of the two systems, see what to look for when shopping, and where to find the best buys.
Before we begin, here are two points about whole house systems, one plus and one minus.
The plus...either of these systems will remove harmful chemicals from your water supply and are a good investment in your family's health. Scientists have proven 50 to 70 percent of the toxic chemicals entering our bodies get there by inhalation and absorption. Those of us on municipal water systems, treated with chlorine, have homes with elevated levels of chloroform gas, from showering, washing dishes or clothes, and flushing toilets, according to the EPA. Removing all sources of such gases is a very good thing to do for your family's health.
The minus...lead is very toxic, and the EPA has declared any level of lead in drinking water unacceptable. Whole house units filter the water when it enters our home and, as the water travels from the filter to your tap, it will likely encounter lead from the pipe's soldering, or the pipe itself (copper pipe is 15% lead). Realize that only a filter on the tap (point-of-use) will insure all lead is removed.
Okay, first, the older technology, reverse osmosis.
The reverse osmosis process forces water to pass through a screen with very tiny pores, removing anything larger than a molecule of water. The process also removes all minerals, but has problems removing chemicals, because their molecular size is smaller than water's. In order to clean up chemicals in the water, RO must be used in combination with a carbon filter.
If the water pressure in the home is too low, a booster pump may be needed to maintain adequate pressure in the system. Even with adequate pressure, several gallons of water, or more, per filtered gallon, will not penetrate the filter. This water is back flushed with the trapped contaminants, and wasted.
As you might expect, this process is very slow, consequently, in order to have an adequate supply of water, under pressure, a storage tank with a diaphragm is needed.
With all these 'bells and whistles', the RO systems are notorious for maintenance problems and high operating costs.
Leaving the 'Rube Goldberg' world of filtration, let's enter the world of selective, or multi-stage, filtration.
These systems also use activated carbon but, here the carbon is first blended with a chemically charged filter resin and then extruded, or compressed, into a solid block containing tiny, submicron pores.
Solid carbon has a tremendous filtering capacity. Scientists say a solid block of activated carbon, one foot square, has a surface adsorption area of five square miles!
This leaves plenty of area for the activated carbon, even in smaller sized blocks, to filter out chemical contaminants, while the submicron pores clean up any remaining sediment and chlorine-resistant cysts, like Cryptosporidium and Guardia.
What about the filter resin that covers the surface of the adsorption area?
As water passes over the resin, positively charged heavy metal ions in the water, like lead and mercury, are forced to break their bonds with water, and attach to the chemically charged resin like little magnets. Lighter minerals, such as calcium and potassium, are not affected.
There you have it, the water is cleaned, and it still contains its nutritious minerals. Selective filtration systems are quick, so there is no need for holding tanks. Nor is there any need for booster pumps, back washing, or electricity, and they operate virtually maintenance free, without wasting water.
What should you look for when shopping for these systems?
When you are shopping, beware of companies that claim "certified components" versus "certified product." You want the product certified, not just individual components! Also, make sure the product is UL, or Underwriters Laboratories, certified, or has a comparable industry rating.
Which is the better buy?
You'll find reverse osmosis units are consistently higher priced than selective filtration units, and their operating and maintenance costs are grossly higher.
All together, this makes selective filtration systems a blessing for consumers... not only are they the best filter system, they are also the cheapest!
David Eastham is a passionate advocate of good, safe water and a researcher of home water filters. Visit his site now at http://www.Good-Safe-Water.com to discover which brand of drinking water filters David recommends after extensive comparison.
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