Sediment filters capture dirt, rust, silt, dust and other particulate matter from water. Sediment filters are usually used at the water input to protect carbon, KDF or other filters from contamination and clogging. Sediment filters may also be used at other stages to protect filters from becoming fouled or clogged from carbon or other fine […]
Water Filtration Technologies
The drinking water filtration, purification and treatment technologies used in the majority of systems include one or more of the following methods or media types:
Activated Carbon
Activated carbon, including granulated activated carbon (GAC) carbon block and catalytic activated carbon Activated carbon can be made from coal, wood, or coconut shell. Coconut shell is the most expensive and effective form. Carbon is “activated” by adding a positive charge, which enhances the adsorption and reduction of contaminants which have a negative charge. The […]
Water Softeners
Water softeners are large floor standing units that use ion exchange resins in the form of beads to exchange hard minerals, (usually calcium and magnesium) with soft minerals including sodium or potassium. As the softener is used, the sodium or potassium that coat the ion resin beads is replaced with calcium and magnesium. Eventually the […]
BASF ATS Media
Originally developed by Englehard Corp. (purchased by BASF), ATS Media removes lead and heavy metals. As with KDF media, there is a synergistic effect when ATS is combined with activated carbon as the two materials result in an effective method of reducing contaminants, heavy metals and chlorine. The Aquasana AQ-4000 drinking water system is the […]
Steam Distillation
One of the simplest methods of purifying water, distilling is the process of boiling water into steam, and then condensing the steam back into water. As gases (including chlorine) and volatile organic compounds (VOCs) can be re-condensed back into the drinking water, most steam distillers use a carbon post filter which adsorbs gases. It is […]
Reverse Osmosis (RO)
Reverse osmosis is an effective method of removing contaminants and minerals from water. Using a semi-permeable membrane filter (Thin Film Composite or TFC), very pure water is produced. RO systems utilize a series of inexpensive filters (sediment, granulated or block carbon), the TFC membrane, and a bulky pressurized rubber or flexible plastic lined metal storage […]
De-Ionization
Often used by laboratories, deionization utilizes a series of ion exchange resins to remove dissolved solids and gases. But many other impurities would remain, so deionization must be combined with other purification methods to produce fully purified water. Deionization alone is not a practical system for drinking water or home use.
Ozone and Ozonation
Ozone, or O3, also called “activated oxygen,” is a highly reactive gas naturally produced in the atmosphere by the photochemical reaction of solar ultraviolet light radiation and oxygen (O2), or by lightning (bio-electrical reaction). At ground level, ozone is produced through the interaction of nitrogen oxides and volatile organic compounds (VOCs), and from ODS (Ozone […]
KDF Media
KDF Fluid Treatment, Inc. As with many inventions, combining copper and zinc to produce an electro-chemical reaction to remove free chlorine was an accidental discovery made by Don Heskett in 1984, which lead to the creation of KDF Fluid Treatment Inc. Originally KDF was an acronym for Kinetic Degradation Fluxion. The discovery resulted in many […]
Ceramic Filtration
Ceramic filters provide very fine filtration, and are recommended for microbiologically unsafe water. With a .5 to .9 micron rating, ceramic filters are effective for filtering bacteria (including E.coli), cysts and sediment. The ceramic material can be cleaned many times with a plastic brush, extending the life of the filter, however in areas with high […]
Ultraviolet Germicidal Irradiation (UVGI) Using UV-C
UVGI sterilization is an option to consider if you are filtering water that may be microbiologically unsafe to drink (i.e. lake water). UV-C sterilization consists of a UV-C lamp, housing and power supply. UV-C lamps should be replaced annually under normal use. UV-A, UV-B, and UV-C are bands of ultraviolet radiation emitted by the sun. […]
Ultra Filtration
Ultra Filtration (UF) uses membrane technology to reject contaminants from 0.01 to 0.2 microns. Compared to RO, UF filtration features a larger pore size, requiring a much lower operating pressure (10 to 100 psi) while maintaining higher flow rates (up to a maximum of 2 gallons/min). UF is effective in the removal of bacteria, pyrogens, […]
Bioceramic Water Amplification (BCWA) Filter
Technically not a filter, bioceramic water amplification (BCWA) is a water amplifier. BCWA utilizes rare ceramic materials including Tourmaline, far infrared ceramic balls, magnesium, calcium, potassium, and Vitamin C to add health promoting qualities to water. Bioceramic water amplification transforms purified water into a powerful antioxidant that provides protection against reactive oxygen species, also known […]