Multi-Pure
Drinking Water Systems are designed to provide the utmost in
performance, safety, and convenience. The replaceable triple-action
filter has been formulated using materials that will provide the
highest quality drinking water without removing the healthful, natural
minerals. Multi-Pure's carbon block filters combine mechanical
filtration, electrokinetic adsorption, and physical adsorption to
provide the most effective contaminant reduction possible.
Water enters the filter through a graded density pre-filter, which
acquires a positive molecular charge in a moving stream of water. Since
most colloidal contaminants exhibit a negative charge in solution, the
media fibers will electrokinetically adsorb charged colloidal particles
too small for removal by mechanical straining. The media combines the
technology of mechanical straining, for the removal and retention of
solid and semi-solid contaminants that can cause premature clogging,
and electrokinetic adsorption for the reduction of colloidal
contaminants down to the sub micron (0.5 micron) range. Then the water
passes through the highly compacted solid carbon block filter that also
is designed to mechanically filter particles down to sub micron size,
including cyst.
The highly compacted solid carbon block filter media is a blend of
selected activated carbons and other materials that reduce inorganics
as well as organic compounds. Many carbons are selected with a high
surface area and high retentivity characteristics. The formulation of
the Multi-Pure CB11As filter includes a specially developed arsenic
adsorbtive media that is blended with the carbons. The materials are
formed into a carbon block, which is densely compacted to enhance the
kinetics of the filter and provide performance that cannot be achieved
with other filtration technologies. With the Multi-Pure CB11As carbon
block filter, the water contact time is longer and provides for greater
adsorption of many different chemicals, pesticides, herbicides, certain
heavy metals, and arsenic.
The solid carbon block filters are exceptionally uniform and do not
channel or allow bypass as conventional granular activated carbon
filters (GAC) are known to do. Unlike conventional GAC filters that
become incubators of bacteria, the densely compacted Multi-Pure filters
eliminate this problem because there is no room for growth in the
compressed carbon.
Finally, the water passes through a post-filter, which provides
integral strength to the carbon block section and prevents material
degradation of the filter. The threaded polypropylene end caps seal the
carbon block and assure the integrity of the seal between the filter
and the housing.
Capacity ratings apply to the chemical adsorption capabilities of the
carbon and specialized media. Filter life will vary in proportion to
the amount of water used and the level of impurities in the water being
processed. Claims of capacity aren't applicable to contaminants reduced
by mechanical filtration because of broad variations in the quality and
quantity of physical matter in the drinking water. The carbon block
filter is engineered so that contaminants removed by mechanical
filtration will cause the flow rate to decrease, and the filter will
clog. It is recommended that the filter be replaced when the first of
the following occurs: (a) annually; (b) the unit's rated capacity is
reached; (c) the flow rate diminishes; (d) the filter becomes saturated
with bad tastes and odors.
The effectiveness of any drinking water treatment device is measured by
the performance of its filter. Multi-Pure's solid carbon block filters
effectively treat a broad spectrum of contaminants of aesthetic as well
as health concern, making it the technology of choice for consumers
throughout the world.