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How The Berkey Light and Big Berkey
Water Filters Operate plus the PF-2 & PF-4 post filters function

The Berkey Light's™ unique design combines the age-old process of micro-porous filtration coupled with modem state-of-the-art technology and the highest quality materials to bring you the finest water filtration System available anywhere. To use, water is poured into the upper chamber. Gravity draws this water through the exclusive Black Berkey™ filter elements. Contaminants are captured on and within the micro-porous filter element and are separated from the water. Each durable and effi-cient elements can be cleaned with a toothbrush and last for up to 2,000 gallons. What's more, the unique Black Berkey™ filter elements are self -sterilizing. The filtered water then collects in the lower chamber where it can be drawn through the spigot.

Often it is desirable to refill the upper chamber while some of the water from the previous cycle remains in the lower chamber. With non transparent or opaque systems the upper chamber must be removed from the lower chamber. This is inconvenient and messy because water continues to drip from the filter elements as the user checks for water levels in the lower chamber. This is especially difficult in no or low light conditions. If the user does not check the water level there is a risk that the upper chamber will be overfilled and later cause the lower chamber to overflow. The Berkey Light™ solves this problem with its transparent design. The user is able to see the water level in both chambers at all times. The system is joined together during use allowing the Berkey Light™ to be moved while it is filtering. This can be important when the Berkey Light™ is used in an area for food preparation and later needed in a dining area. The system can also be disjoined for cleaning, maintenance and transport etc. Pathogenic Bacteria Cysts & Parasites Removed to Non-Detectable Levels! E. Coli, Klebsiella, Pseudomonas Aeriginousis, Giardia, Cryptosporidium Trihalomethanes Removed to below detectable levels! Health effects: Muscle and nervous system disorders, Cancer. Bromodichloromethane, Bromoform, Chloroform, Dibromochloromethane

Inorganic Minerals Removed to below detectable levels!!!
Chlorine (residual) leads to cancer and birth defects
Lead leads to kidney and nervous system damage
Mercury leads to kidney and nervous system damage
Aluminum leads to respiratory and nervous system disorders
Cadmium leads to kidney damage
Chromium leads to liver, kidney, circulatory system disorders
Copper leads to gastro-enteric diseases
The Berkey Light Removes 95% !!!
Nitrates and Nitrites are reduced 85% at 19mg. per liter!!!
Filter elements are self-sterilizing! Optional 8 Lamp LED lighting available!

Volitile Organic Compounds (VOCS)
Removed to below detectable levels!!

Alachlor, Atrazine, Benzene, Carbofuran, Carbon Tetrachoride, Chlorine, Chlorobenzene, Chloroform, 2,4-D, dbcp p-Dichlorobenzene, o-Dichlorobenzene, 1, 1-Dichloroethane, 1, 2-Dichlorpethane, 1, 1-Dichloroethylene Cis-1, 2-->Dichloroethyiene Trans-1,2- ->Dichloroethylene 1, 2-Dichloropropane cis-l,3- ->Dichloropropylene, Dinoseb, Endrin, Ethylbenzene, Ethylene Dibromide (EDB), Heptachlor, Heptachlor Epoxide, Hexachlorobutodlene, Hexachlorocyclopentadlene, Lindane, Methoxychlor, MTBE, Pentachlorophenol, Simazine, Styrene, 1,1,2,2- ->Tetrachloroethane, Tetrachloroethylene, Toluene 2,4,5-TP (Silvex) 1,2,4-trichlorobenzene, 1,1,1-trichloroethane 1,1,2-trichloroethane, Trichloroethylene, o-Xylene, m-Xylene, p-Xylene

The Berkey Light™ Filter element has been tested by State & EPA accredited laboratories to exceed EPA & ANSI/NSF (Std. 53) protocol. Tested by the University of Phoenix. Spectrum Labs, the Department of Toxicology and Environmental Science Louisiana University.

How to Use the Berkey Light

To use, water is poured into the upper chamber. Gravity draws this water through the exclusive Black Berkey™ filter elements. Contaminants are captured on and within the micro-porous filter element and are separated from the water. Each durable and efficient elements can be cleaned with a toothbrush and last for up to 2,000 gallons. What's more, the unique Black Berkey™ filter elements are self -sterilizing. The filtered water then collects in the lower chamber where it can be drawn through the spigot.

Often it is desirable to refill the upper chamber while some of the water from the previous cycle remains in the lower chamber. With non transparent or opaque systems the upper chamber must be removed from the lower chamber. This is inconvenient and messy because water continues to drip from the filter elements as the user checks for water levels in the lower chamber. This is especially difficult in no or low light conditions. If the user does not check the water level there is a risk that the upper chamber will be overfilled and later cause the lower chamber to overflow. The Berkey Light™ solves this problem with its transparent design. The user is able to see the water level in both chambers at all times. The system is joined together during use allowing the Berkey Light™ to be moved while it is filtering. This can be important when the Berkey Light™ is used in an area for food preparation and later needed in a dining area. The system can also be disjoined for cleaning, maintenance and transport etc.

PF-2 add on filters $61.00 pair + s&h.

PF-2 POST FILTER REDUCTION ELEMENT
PF-2 reduction elements are designed for use in conjunction with Berkey Light water filters and install under the top chamber, to absorb the following four unwanted elements most commonly found in drinking water.

  • MTBE (Methyl-tertiary-butyl-ether)
  • Fluoride
  • Lead
  • Arsenic

PF-2filters are also designed to adsorb:

  • DBCP (Dibromo-chloro-propane)
  • THM’s (trihalomethanes)
  • Herbicides & Pesticides
  • Heavy Metal ions

INSTALLATION: Assemble the water filter as per the water filter assembly instruction. On the underside of the upper chamber locate the stem of each ceramic filter (do not remove the wing nut holding the ceramic filter in place). With clean hands, remove blue caps and screw a PF-2 filter onto each filter stem (the blue arrow should point away from upper chamber) giving five full revolutions. Do not screw more than five revolutions as this may damage the internal media screen. When complete, seat upper chamber on top of the lower chamber. Fill upper reservoir. When the lower reservoir is full, discard the first batch of water, which may contain process dust. (Note: when lower chamber is full of water, the PF-2 filters will be immersed).

TECHNICAL INFORMATION: MTBE: The PF-2 is manufactured to exceed ANSI/NSF Standard 53 which requires that MTBE be reduced by at least two thirds from an influent rate (water going in) of 15ppb to an effluent rate (water going out) of less than 5ppb (> 95% reduction*). LEAD: Tests have shown that when 2000 gallon of influent water at a concentration of lead of 150-200 ppb pass through 200 grams of media at a flow rate of 1gpm, the lead level was reduced to less than 1ppb (>99% reduction). FLOURIDE: Testing for fluoride was based on 20-30ppm of the ion in the influent aqueous solution at a flow rate of no more than 3 gpm per cubic foot of media. Results of
< 1ppm of the fluoride ion in the effluent were typical for the media (>95% reduction). Under optimum conditions, effluent concentrations of less than 50 ppb were readily achieved (>99.75% reduction).

REPLACEMENT: Under normal conditions it is recommended that PF-2 elements be replaced at six-month intervals ( Actual capacity is dependent on the presence of other competing contaminants in the source water. High levels of total organic carbons, volatile organic compounds or certain inorganic minerals may reduce the capacity and efficiency of these elements. )*. Note: do not boil this element.

MTBE (Methyl-tertiary-butyl-ether) is the most common oxygenated fuel additive used in reformulated gasoline. Contamination of groundwater with MTBE is a rapidly growing problem in 49 U.S. states. In drinking water, even trace amounts of MTBE can cause taste and odor problems, which may lead to nausea and dizziness. The potential long-term health effects of MTBE are not understood at this time, however, initial studies indicate MTBE may cause kidney and liver problems. MTBE removal from water is a challenge because it is very soluble in water and must compete with other organics for binding sites on the filter medium. These other contaminants (BTEX - and TOC - total organic carbons) are adsorbed more readily, and MTBE often slips by standard carbon filters, ending up in the filtered water. The PF-4 filter has been specifically designed to remove MTBE from drinking water when used in conjunction with a British Berkefeld gravity filter system. The media within the Super Sterasyl filters, in the upper chamber, capture the more strongly adsorbed BTEX and TOC's. This permits the downstream PF-2, secured as a post filter, to more efficiently remove MTBE

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PF-2 add on filters for Berkey Light $61.00 pair + s&h

PF-4 add on filters for Big Berkey set of 4 $112.00 + s&h.

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PF-2 and PF-4 FAQ'S

Do your filter elements reduce fluoride in the water?

No, in order to reduce fluoride in your water you will need to use post filters that work in conjunction with the filters in your system. We have two types, PF-2's, which are used in conjunction with the Black Berkey® purification elements, and the PF-4 filters that are used in conjunction with our ceramic filters.

I noticed that the PF-4 elements also remove MTBE and heavy metals. Should I use these with my Black Berkey® purification elements?

No, the PF2's are used in conjunction with the Black Berkey® purification elements and the PF-4 elements are used in conjunction with the ceramic filters in the Big Berkey. The Black Berkey® elements remove MTBE and reduce heavy metals whereas the ceramic filters do not therefore; we incorporated MTBE and heavy metals reduction capabilities into the PF-4 elements.

What is the life of the PF-4 filters?

Each set of four PF-4 filters will last for 1,000 gallons or six months whichever comes first. The reason for the six-month limitation is that the carbon within the PF-4 filters extracts contaminates that can be nutrients on which bacteria can grow. If the filters are used longer than six months “grow-through” can occur.

What is the life of the PF-2 filters?

Each set of two PF-2 filters is will last for 1,000 gallons. Since these elements contain pure fluoride and arsenic reduction media and no carbon, there is no six-month limitation rule as is the case with the PF-4 elements.

How do I know when 1,000 gallons has been filtered and when its time to replace the elements?

The best way to gauge when to replace the filters is to do the following:

1) Keep a track of how many times per week you need to refill your system.
2) Then multiply that figure times the capacity in gallons of your particular system (for example the Berkey light™ system is 2.75 gallons) to determine Total Gallons Used Per Week.
3) Finally divide the Total Gallons Used Per Week into the 1000 gallons and that will tell you how many weeks before the filters should be replaced.
4) Next calculate the future date for replacement (52 weeks per year) and write that date on a sticker and attach it to the bottom of your system for future reference.

By the way, if you have been using your fluoride reduction filters for some time now, you can still use the above formula to determine when to replace the elements. Just count forward from the date you purchased your elements.

I installed my PF-2 elements but my water is a bit cloudy and why does it have a funny taste?

The odd taste is from process dust that may not have been washed free from the filter elements during the conditioning process. Please remove the PF-2 elements and re-condition them for 60 seconds on both ends. This should expel any residual process dust and fix the problem.

Do the PF-2 elements replace the Black Berkey® purification elements?

No the Black Berkey® elements fit into the base of the upper chamber with the stems of the filters protruding through the holes in the base of the upper chamber. The protruding stems are threaded and the PF-2 filters screw onto these threaded stems so that the PF-2's hang down into the lower chamber. The water flows from the upper chamber, through the Black Berkey® elements, into the PF-2 filters and then into the lower chamber. The “PF” in PF-2 stands for Post Filter. So in answer to your question, no they do not replace the black filters but rather work in conjunction with them.

If I begin using use the PF-2 elements, will I need more counter space for my system?

No, the PF-2's attach to the stems of the Black Berkey® elements and hang down into the interior of the lower chamber of the system requiring no additional counter space.

I understand that the media used within the fluoride reduction elements is activated alumina, it that the same thing as aluminum?

The media used to extract the fluoride and arsenic is activated alumina. Since fluoride is a by-product of aluminum production, fluoride has a natural affinity to recombine with activated alumina making it an ideal extraction media. We are not chemists but will communicate our understanding on the subject. Both nutritionist and lab technicians have informed us that aluminum and alumina are two separate animals. Aluminum can cross the blood brain barrier and cause problems with the brain whereas alumina is inert. It is our understanding that alumina is oxidized aluminum. Aluminum is regulated whereas alumina is not for example, alumina is the material used for making the paste in toothpaste. At any rate, when testing for aluminum in water, most tests cannot distinguish between aluminum ions and oxidized alumina. Since we are not chemists, we tested the effluent from the filters and included that information in our brochure. While we were not required to do so, we felt that it was important to disclose to our customers what our results were so that they would have the necessary information to do further research on the issue should they desire to do so. We thin it was significant in the test we conducted using the combination of Black Berkey® elements and PF-2 elements there was a net reduction in the tested aluminum content of the source water vs. the purified water. Again that test did not distinguish between aluminum and alumina. The bottom line is that the media utilized is oxidized alumina and not aluminum.

What are the dimensions of the PF-2 and PF-4 elements?

The individual elements are 6” in length and 2.5” in diameter.

I have high PH in my water, will that reduce the efficiency of the PF-2 elements?

That is correct, high or low PH impedes the ability of the media to remove fluoride.

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