Berkey Fluoride and Arsenic Filters (set of 2)

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PF-2  Fluoride & Arsenic Reduction Filters: 

PF-2 reduction elements are designed for use in conjunction with Black Berkey water purification elements to adsorb the following unwanted elements found in drinking water:       
  • Fluoride
  • Arsenic V and pre oxidized Arsenic III
  • Other residual heavy metal ions     
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).
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 (The Big Berkey, for example, is 2.1 gallons therefore the PF-2 filters should be replaced after roughly 476 refills. If the system is refilled about one time per day, the filters should last for more than a year.  If the system is refilled about twice per day, they should last more than six 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.
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