Water filters, purifiers and water filtration systems convert ordinary tap water into perfectly safe drinking water. They remove impurities and contaminants by means of a fine physical barrier or a chemical process.A water filter or water purifier is very beneficial for healthy living. Ordinary water contains numerous contaminants including bacteria, algae, viruses, fungi, minerals, and man-made chemical pollutants that cannot be seen with the naked eye. These contaminants not only cause the water to taste bad, but are also very harmful to your health.

A water filter kills all of these organisms and filters out the contaminants to make the water fit for drinking. Thus water filters save us from many dangerous bacterial and viral diseases that spread due to the contamination of water.The working technique of water filters is based on sieving, ion exchanges and other processes. A water filter can eliminate particles much smaller than the holes through which the water passes.