Refrigerator water filters are the best way to ensure your tap water is as pure as it can be. Most tap water contains a number of impurities such as chlorine, copper and lead, as well as potentially harmful naturally occurring bacteria that can lead to stomach upsets.
A modern water filter will work in 2 ways to ensure your water is clean - by using a physical filter and also a chemical filter. The physical filter is usually a fine carbon mesh that traps particles before they enter the water. When you think carbon, don't think coal. It's actually in a form more akin to sand. In any case, it doesn't dirty up your water, it cleans it.
The chemical filter is held inside a plastic cartridge, which is suspended into the water inside the water filter. This filter contains a number of different chemicals, each of which is responsible for removing a certain type of foreign body from your water.
Filters generally last about a month to 3 months depending on use, and will light up to let you know they need replacing. You will also be able to notice when they are less effective as the water will taste different.
The best water filters will ensure that minerals important to your body, such as calcium and magnesium, are not removed from the water. These are very important for a healthy body.
Prices start from around £10 for a pack of 6 filters at 2009 prices, which would last you well over a year of average use
by Tom Wilkinson
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