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Berkey PF-2 Fluoride Arsenic Reduction Elements


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2 Berkey PF-2™ Fluoride and Arsenic Reduction Elements ($60.00)

4 Berkey PF-2™ Fluoride and Arsenic Reduction Elements ($120.00)

6 Berkey PF-2™ Fluoride and Arsenic Reduction Elements ($180.00)

8 Berkey PF-2™ Fluoride and Arsenic Reduction Elements ($240.00)


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Berkey PF-2™ Fluoride and Arsenic Reduction Elements

The PF-2™ Fluoride and Arsenic Reduction Filters are made and assembled in the USA

  • The Berkey PF-2™ Fluoride and Arsenic Reduction Elements adsorb the following unwanted elements found in drinking water:
    • Fluoride: Sodium Fluoride, Sodium Fluorosilicate, Fluorosilicic Acid (aka Hydrofluorosilic Acid)
    • Arsenic: V and pre-oxidized Arsenic III
    • Other residual heavy metal ions
  • Made from safe, non-leaching Polypropolene #5 that is BPA-free
  • Sold in a set of 2
  • Berkey PF-2™ Fluoride and Arsenic Reduction Elements are designed to be used in conjunction with the Black Berkey® Purification Elements only
  • Attach to the bottom of the Black Berkey® Purification Elements and sit in the lower chamber of the Berkey unit
  • Number of Berkey PF-2™ Elements in the bottom chamber must match the number of Black Berkey® Purification Elements in the top chamber; for example, 4 Black Berkey® Purification Elements would require 4 PF-2 Filters
  • Set of 2 Berkey PF-2™ Elements need replacement after 1000 gallons of use
  • The Berkey PF-2™ Fluoride and Arsenic Reduction Elementsare covered under a six month warranty




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 (11 lpm) per cubic foot of media.

PF-2 arsenic and fluoride water filtration 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
Sodium fluoride, sodium fluorosilicate, and fluorosilicic acid (aka hydrofluorosilicic acid) all dissociate (breakdown) to fluoride, sodium, and silicate ions once added to water.
This PF-2 media filters any type of inorganic fluoride salt ions that are added to the water.
More Details on Fluoride/Arsenic Filter Testing and Media Specifications



This product uniquely targets the entire family of arsenic oxide anions as well as the arsenic cations.



Under normal conditions it is recommended that each set of two PF-2 elements be replaced after 1,000 gallons (3,785 liters). The Royal Berkey system is about 3.25 gallons (12.3 liters) therefore the PF-2 arsenic and fluoride water filters should be replaced after 1,000/3.25 (3,785/12.3) or 307 refills. If the system is refilled about one time per day, the PF-2’s should be replaced after 10 months, if the system is refilled about twice per day, the PF-2’s arsenic and fluoride water filters should be replaced about every five months). Actual capacity is dependent on the presence of other competing contaminants in the source water. High levels of fluoride, arsenic and heavy metals may reduce the capacity and efficiency of the elements.





PF-2 Filter NOTES:


  1. Do not boil this element.
  2. PF-2 arsenic and fluoride water filters reduce filtration flow rate by 15-20%.
  3. The media used in the PF-2 filter elements contains high-grade activated aluminum oxide, which currently is the most efficient media available for extracting fluoride from water. Below are the results we obtained when testing the PF-2 arsenic and fluoride water filters (the water was not pre-filtered through the Black Berkey elements). The reduction over time is due to additional residual process dust being washed free from the PF-2 arsenic and fluoride water filters as the system is used. To give a scale for comparison purposes we include test results from a national brand toothpaste and water boiled in an aluminum pan.
  • National brand toothpaste 52.878 ppm aluminum
  • Water boiled in an aluminum pan for five minutes: 2.791 ppm aluminum
  • PF2 after conditioning (5 cycles): .178 ppm aluminum
  • PF2 after 10 Cycles: .037 ppm aluminum
  • PF2 after 20 Cycles: .029 ppm aluminum


While the above results indicate that the residual process dust adds a minute amount of aluminum to the water, the Black Berkey purification elements reduce aluminum from the water. We tested water that naturally contained .320ppm aluminum and filtered it through the combination of the Black Berkey and the post conditioned PF-2 arsenic and fluoride water filters (5 cycles). The results showed a net reduction in aluminum contamination (Raw influent: .320ppm – Effluent after passing through the Black Berkey and PF-2 arsenic and fluoride water filters: .232ppm). In other words, the Black Berkey elements removed more aluminum from the water than was added by the PF-2 arsenic and fluoride water filters.


Priming the PF-2 Berkey Fluoride Post Filter is essential for them to perform properly. The filter media in each element contains some residual manufacturing dust that may cause the water to be cloudy or have a bitter after taste. This can be easily avoided by simply flushing the filter prior to installation.

Follow the instructions below to insure that your Berkey purifier performs as designed:



Filters must be primed prior to use. Do not install before reading the enclosed installation procedures and do not screw the PF-2 elements onto the stem of the Black Berkey elements more than eight revolutions or the core of the filter could be damaged.





1. With the blue caps in place wash the exterior of each PF-2 fluoride element with water and a mild dish washing soap.

2. With clean hands, remove the blue caps from both ends of each filter element.

3. Place the tan colored rubber priming button against one end of the PF-2 filter, making sure to align the hole of the filter with the hole of priming button.

4. Press the filter and priming button firmly against the sink faucet to create a seal between the faucet and the PF-2 element.

Hint: Place your thumb on top of the faucet to help apply pressure and to create a secure seal.

5. While holding the filter securely against the faucet, turn the cold water on slowly, allow water to fill the filter and discharge from the opposite end for at least 30 seconds or until the water runs clear whichever is longest.

6. Turn the PF-2 filter over and prime the opposite end by reversing the water flow, keep repeating steps 3 thru 5 until water runs clear from both ends.

7. Prime each PF-2 element of your system as described above.

Hint: When you think the filters are primed – get a clear glass and flush both ends again into the glass to check for cloudiness and insure proper operation of the PF-2 filter, if not continue priming until water is clear. This filter is now properly primed and ready to install.


PF-2 Elements


Do your Black Berkey® purification elements filter elements reduce fluoride in the water?

No, to reduce fluoride in your water you need to use one of PF-2 post filters that work in conjunction with the elements in your Berkey® system.


What is the life of the PF-2 filters?

Each set of two PF-2 filters will last for 1,000 gallons. These elements contain pure fluoride and arsenic reduction media without the carbon.


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. Determine the Total Gallons Filtered by multiplying the number of filters in your system by 500. [e.g. – 2 filters = 1000 – 4 filters = 2000 – 6 filters = 3000]
  2. Next keep a track of how many times you need to refill the upper chamber in one week. Now multiply the number of refills by the capacity in gallons of your particular system (e.g. the Berkey Light™ system is 2.75 gallons) to determine Total Gallons Used per Week.
  3. Divide the Total Gallons Filtered by Total Gallons Used Per Week the result will tell you how many Weeks of Use before the elements should be replaced.
  4. Next calculate the Element Replacement Date (52 weeks per year) and write the date on a sticker and attach it to the bottom of your system for future reference.

If you are already using your system, calculate the Weeks of Use and just be sure to count forward from the date when you purchased your system.


I installed my PF-2 elements but my water is cloudy and has a funny taste?

The cloudiness and odd taste comes from process dust that may not have been washed free from the filter elements during the priming process. Please remove the PF-2 elements and re-prime them to expel any residual process dust which should then correct the problem.


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

No, the “PF” in PF-2 stands for Post Filter and they are designed to supplement the Black Berkey® element in those situations where additional contaminate filtration is required. The Black Berkey® elements are installed into the base of the upper chamber with their stems protruding through the holes in the bottom. The stems of the Black Berkey’s are threaded to allow the PF-2 filter option to be added at your convenience. Once threaded onto the stem of the Black Berkey® elements, the PF-2′s will hang down into the lower chamber. Water flows from the upper chamber through the Black Berkey® elements, into the PF-2 filters and then into the lower chamber.


Do I need more counter space for my system if I choose the PF-2 filter option?

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 think 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?

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.

The use of activated alumina in a continuous flow fluidized system is an economical and efficient method for de-fluoridating water supplies.


Berkey PF-2 Fluoride Arsenic Reduction Elements



2, 4, 6, 8

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