How the Multi-Pure Arsenic Filters Work
How the Multi-Pure Filters Work
25
YEARS - Housing Warranty
The exterior housing (canister), stainless steel or plastic, is warranted for use and will be repaired or replaced at "NO CHARGE."
12
MONTHS - Accessories Warranty
All exterior hoses and attachments are warranted for use and will be repaired or replaced at "NO CHARGE."
Guaranteed Quality
Multi-Pure Drinking Water Systems are made of Food and Drug
Administration approved materials. Multi-Pure Systems are designed to be used
on treated water systems; they are not intended to be used where the water is
microbiologically unsafe or with water of unknown quality without adequate
disinfection before or after the unit. The System may be used for cyst
reduction on disinfected waters that may contain filterable cysts. Multi-Pure
warrants its System housings to be free of defects in material and
workmanship for use under normal care for a period of twenty-five (25) years.
Multi-Pure filters (cartridges) are warranted for defects in material and
workmanship for use under normal care. For optimum performance, filter
cartridges require periodic replacement dependent upon use, type, and level
of contaminants in local water (up to 750 gallons of drinking water; up to
1200 gallons with capacity meter); therefore, it is recommended that filters
be replaced annually or sooner if needed.
Solid Carbon Block Filters
Drinking water
pollution comes from many sources. Surface water becomes contaminated from agricultural
runoff, community landfills, polluted runoff (the nation's leading cause of
water pollution), and hazardous waste produced as byproducts of
manufacturing. Groundwater is contaminated by leaks of pollutants such as
gasoline and MTBE from underground storage tanks and injection of hazardous
waste into deep wells (which is being phased out). The drinking water
treatment industry is experiencing significant growth due to consumer demand
for products that could protect them from these potentially harmful
contaminants which may be found in drinking water supplies as well as
aesthetically improve their water.
Highly Regarded
The effectiveness of any drinking water treatment device is measured by the
performance of its filter. A close review of drinking water treatment unit
certifications shows that solid carbon block filters are the most effective
for reducing a wide range of contaminants, including those that may be found
in groundwater. Certain drinking water treatment units (DWTU) that use solid
carbon block filters have been tested and certified to reduce as many as 65
contaminants.
In the early 1970s, the solid carbon block filter technology was developed
for the purpose of treating contaminants for health reasons as well as
aesthetically improving water quality.
The technology combines mechanical filtration, chemical reaction and physical
adsorption into a single device to reduce a broad spectrum of harmful
contaminants.
Importance of Raw Materials
Activated carbon is the primary raw material used in solid carbon block
filters. Multi-Pure determines the characterization of activated carbons to
use for its filters. Carbons specified are especially effective in reducing
inorganics such as lead and mercury as well as organic compounds - disinfection
by-products (DBPs), volatile organic compounds (VOCs), PCBs, MTBE, etc.
Many carbons are selected with a high surface area and high retentivity
characteristics. Years of research, development and manufacturing experience
have helped Multi-Pure develop specifications for carbon and other media that
give its compacted carbon block filters distinctive performance advantages
over other treatment alternatives. Quality assurance procedures are carefully
developed and maintained to assure that raw materials meet our high
standards.
Technological Advantages
As evidenced by independent laboratory testing and certification of solid
carbon block filters, Multi-Pure has been successful in developing the
technology to produce filters that provide greater chemical adsorption and
mechanical filtration. Materials are formed into a carbon block, which is
densely compacted. Compression enhances the kinetics of the filter and
provides performance that cannot be achieved with extruded or granular
activated carbon (GAC) filters. Compacted solid carbon block filters have a
large surface area for chemical/physical adsorption to take place. With a
solid carbon block, the water contact time is longer and provides for greater
adsorption of many different chemicals, pesticides, herbicides and certain
heavy metals. A close review of product listings confirms that Multi-Pure's
Drinking Water Systems are among the few that have been certified to reduce
PCBs -a difficult contaminant to treat. Only a handful of products have been
tested and certified to reduce a wide range of contaminants that are more
difficult to treat.
In addition, the densely compacted carbon block mechanically filters
particles down to 0.5 micron, including Giardia and Cryptosporidium,
asbestos, turbidity and particulates. Our filter design incorporates an outer
prefiltration medium to remove large particles and prevent premature clogging
of the filter. Multi-Pure's solid carbon block filters are exceptionally
uniform and don't channel or allow bypass.
Filter Capacity
Filter capacity varies depending on the density and size of the filter. The
characterization of activated carbons used by Multi-Pure determines the
capacity of the water filters. Capacity ratings apply to the chemical
adsorption capabilities of the carbon and specialized media. Carbons with a
high surface area allow for long life and high adsorption capacity. Capacity
ratings for Multi-Pure Drinking Water Systems range from 400 gallons to 1,200
gallons, depending on model.
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 solid carbon block filter is
engineered so that contaminants removed by mechanical filtration will cause
the flow rate to decrease and the water filters to clog, thus offering
protection to the consumer from Giardia, Cryptosporidium and other
contaminants with a specific physical size.
Applications
Solid carbon block filters are used in point-of-use drinking water treatment
devices designed for countertop, undersink and inline applications.
Conclusion
Solid carbon block filters effectively treat the age-old contaminants of
yesteryear, such as lead, TCE, chlorine, benzene and "new" contaminants
found in the nation's drinking water supplies today like MTBE, chloramines
and PCBs. They also likely will be proven capable of significantly reducing
contaminants that may be found in drinking water supplies in the future such
as antibiotics and other drugs. The effectiveness of solid carbon block
filters in treating a broad spectrum of contaminants of aesthetic as well as
health concern makes it the technology of choice by distributors and more
importantly, consumers throughout the country.