H2O, commonly known as water, is the most essential natural substance for our survival. It regulates body temperature and aids metabolic process. Drinking about eight glasses of water everyday is recommended to maintain hydration levels of our body. People living in hotter climates and athletes may need even more. The quality of water is as important as the quantity. The quality of tap water has been declining gradually because of the presence of industrial pollutants, chemicals and many other toxins. Children, pregnant women and elderly people are at a greater risk of contacting diseases if they drink contaminated water. A good water filter thus becomes a necessity for every home.

Under the sink water filters are the most commonly found among all the versions of water filters available. These filters are mounted under the sink. The water which comes to the sink first passes through these filters. The filter traps all the impurities which are present in the supply water and clean water is dispensed to the sink through a separate tap. The supply water, though assumed to be clean, contains many toxic materials. These include industrial wastes, sediments in water pipes and other chemicals leeching into ground water. These substances can cause severe harm to human body. The water that comes to taps is regular ground water which is treated with Chlorine to remove and kill bacteria. Chlorine is also very harmful.

Under the sink water filters may work in two ways – It may be a reverse osmosis filter or a carbon block filter. The reverse osmosis filters are expensive and require a complicated installation procedure. In comparison, carbon block filters are easier to install and are also cost effective. These consist of a cartridge filled with activated carbon, which traps chlorine, other herbicides and odors which are generally found in tap water. The reverse osmosis filters consist of a membrane through which only pure water molecules can pass. The remaining water molecules, in which minerals and other substances are present, flow away as waste. The reverse osmosis filter is believed to deliver the purest water but actually it removes even trace minerals which are naturally present in water and are beneficial for humans. The EPA recommends the carbon block filters.

Under the sink water filters are more in demand compared to countertop filters, shower filters or whole house filters. The first reason is of course the cost. These filters are boon in houses which have less or no room for a big counter top filter. The only maintenance required is to change the cartridge periodically, which is very simple. The active carbon block filters which also include ion exchange ensure that nearly 90% of the impurities are removed, leaving the essential minerals intact. It also makes sense because it saves the expense of buying bottled water for drinking and thus protects the environment also from being spoilt due the plastic bottles. There are different units available for every budget and space available.

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And for the first time ever, owners of home carbonating machines have quick and easy access
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