KDF Media can remove up to 99% of water-soluble lead, mercury, nickel, chromium, and other dissolved metals. First stage filtration is when the water enters the cartridge, it is passed through a 1 micron prefilter that removes suspended particles, such as silt, sediment, sand, rust, dirt,. In the second next stage, the water passes through a bed of a media made of a special high-purity alloy blend of two dissimilar metals - copper and zinc KDF55 This media, is a major advancement in water treatment technology that works on the electro-chemical and spontaneous-oxidation-reduction (redox) principles. Chlorine is instantaneously and almost inexhaustibly oxidized. Tests on this cartridge have shown 99+% chlorine removal past 15,000 gallons of water while a carbon cartridge of comparable volume drops below 90% effectiveness after only 4,000 gallons. Iron and hydrogen sulfide are oxidized into insolubable matter and attach to the surface of the media. Heavy metals such as lead, cadmium, and aluminum are removed from the water by the electrochemical process.
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