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Some Homes Require Domestic Water Purifier
By Tony Cunningham

For those living in the wilderness or just out in the country, beyond the reach of municipal water supplies, having clean, pure water may sometimes pose a challenge. Depending on the quality of the water below the waterline, filters and purifiers may be needed to construct a domestic water purifier.

Understand there is a difference between filtering water and purifying water. Typical water filters remove particulate matter down to a specific size, usually down to about .1 millimeter. However, most bacteria are less than .01 millimeter in size and in additional to a water filter, a domestic water purifier may be required.

Removing the larger particles in the water, will make it appear clean. When you allow a glass of water to sit for a long time, there usually is no sediment in the bottom of the glass, giving you a false sense of security about the quality of the water. A domestic water purifier will remove the bacteria swimming around in your drinking water that you cannot see, which can cause serious illnesses.

Choosing Between Filters And Membranes

Having your water tested in a qualified laboratory to determine the amount and type of bacteria in your water may be a good first step in determining the type of domestic water purifier you need. If the test shows your water is free of bacteria, a filtering system capable of removing particles under .1 millimeter in size may be sufficient. However, if bacteria are present, you may want to consider a reverse osmosis domestic water purifier, which can filter as small as .0001 millimeter, which is small enough to remove bacteria as well.

There are varying sizes of reverse osmosis membranes in the domestic water purifier but typically they consist of 20 layers of membranes wrapped in a spiral fashion and will need periodic cleaning. However, unlike a compressed charcoal filter, many units use a backwash system essentially to clean themselves, making filter changes necessary less frequently.

Another type of domestic water purifier involves treating the water with chlorine or iodine to kill harmful bacteria in the water. While some units are equipped with a chlorinator and a de-chlorinator, the taste is still typically present in the water. There are also some people who cannot tolerate iodine, making chlorine the only method usable to them. Whichever domestic water purifier you choose, a filtering system should be in place first to make the purification system operate with the most efficiency.

Author Details:
Tony Cunningham is a gadgets fanatic writing about electrical items such as cellular mobile phones, HDTV, Satellite TV and other household gadgets such as water purifiers.

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See also: Water filters