Stage
1, water flows through pre and post one-micron filtration pads small enough to remove
suspended particles such as silt, sediment, rust, sand, dirt, other undissolved
particles as well as microbiological cysts (giardia, cryptosporidium) Stage
2 & 3, Water passes through a bed of media made of a special
high-purity alloy blend of two dissimilar metals - copper and zinc (KDF-55D® and
KDF-85D®) KDF 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 KDF/GAC cartridge have shown 99+% chlorine removal past 20,000
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 insoluble matter and attach to the surface of the media. Heavy metals such as lead, mercury, copper, nickel
chromium, cadmium, aluminum, and other dissolved metals are removed from the water by electrochemical process. They are attracted to the surface of the
media, much like a magnet. The media inhibits bacterial growth throughout the entire unit. In fact, it has been shown to be reduced up to
90%, eliminating the need for silver, which is commonly used in carbon-only filters (silver is considered a pesticde by the EPA and, as such,
must be registered with them).
Is copper or zinc added to the water in any significant amount? On 2.3 ppm chlorinated water,
>0.05 mg/1 copper and only 0.46 mg/l zinc were measured. The EPA
aesthetic levels are 1.0 mg/l for copper and 5.0 mg/l for zinc.
Both zinc and copper are essential minerals for good health - the FDA
recommends a daily intake of 15 mg of zinc and 2 mg of copper
Click
here to learn more about KDF
Stage
4 Water flows through ion exchange resins, reducing heavy metals such
as lead, copper, aluminum and water hardness.
The Crystal
Quest filters use coconut shell carbon which provides a significantly
higher volume of micropores that either coal, wood or lignite based
carbon. As a result, it is more effective than other carbon types in
removing THMs and other chemicals from municipally supplied water.
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