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2013 Manufacturer Whole House Filters L-CF101B 2600L/HR 304 Stainless Steel Tap water enter UF membrane firstly, under the great water pressure, 0.01micron membrane eyes gathering at the surface of the membrane only permit water molecule and microelement pass through, then tap water become purified water, but rust , bacterium , colloid , silt , macromolecule organic matter are held back in the UF membrane , discharged when the UF membrane is washed.Whole House Filters