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2. Water filter - Wikipedia

   en.wikipedia.org/wiki/Water_filter

   Water filter. A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and ...

3. History of water filters - Wikipedia

   en.wikipedia.org/wiki/History_of_water_filters

   The history of water filters can be traced to the earliest civilisations with written records. Water filters have been used throughout history to improve the safety and aesthetics of water intended to be used for drinking or bathing. In modern times, they are also widely used in industry and commerce. The history of water filtration is closely ...

4. Reverse osmosis - Wikipedia

   en.wikipedia.org/wiki/Reverse_osmosis

   Reverse osmosis (RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions. RO can remove dissolved or suspended chemical species as well as biological substances (principally bacteria), and is used in ...

5. Do You Really Need a Water Filter? - AOL

   www.aol.com/lifestyle/really-water-filter...

   They do not, however, filter out viruses and bacteria. Other filters need a plumber or a home handyperson to install. They sit either on the countertop or under the sink, at just a single faucet ...

6. Category:Water filters - Wikipedia

   en.wikipedia.org/wiki/Category:Water_filters

   C. Ceramic water filter. Chamberland filter. Coffee filter. Copper zinc water filtration. Cross-flow filtration.

7. Ultrafiltration - Wikipedia

   en.wikipedia.org/wiki/Ultrafiltration

   Ultrafiltration. Ultrafiltration (UF) is a variety of membrane filtration in which forces such as pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass through the ...