Water filter use ultrafine barriers to remove physical, chemical, and biological pollutants and make them usable in different day-to-day activities. Most of the water filter as media, sand, screen, and disk filters use adsorption, ion exchange, and sieving to reach the goal. Find activated carbon filters, microfiltration, and ultrafiltration filters in a water purifier to make it a series filter. These water filters not only remove commonly found scums from water it also eradicate bad taste, odor, and hardness from source water. The best-selling water filters include reverse osmosis, ion exchange, absorption, and mechanical water filters.