purification elements to adsorb the following unwanted elements found in drinking water.
• Arsenic V and pre-oxidized Arsenic III
• Other residual heavy metal ions
FLUORIDE: 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).
ARSENIC: This product uniquely targets the entire family of arsenic oxide anions as well as the arsenic
Under normal conditions it is recommended that each set of two PF-2™ elements be replaced after
1,000 gallons The Royal Berkey® system is about 3.25 gallons therefore the PF-2™ filters should be
replaced after 1,000/3.25 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 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.
1) Do not boil this element.
2) PF-2™ elements 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™ elements (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™ elements 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™ filtration elements (5 cycles). The results showed a net
reduction in aluminum contamination (Raw influent: .320ppm - Effluent after passing through the Black
Berkey® and PF-2™ elements: .232ppm). In other words the Black Berkey® elements removed more
aluminum from the water than was added by the PF-2™ elements.
|Our Price: $65
|Our Price: $65