Set of 2 Filters
2 filters are good for 3,785 liters of water or 1 year, whichever comes first.
Made of safe non-leaching plastic.
Free Delivery in the UK & EU
The only countries in Europe that continue to fluoridate their water are Ireland & parts of England and Spain. Fluoride is naturally present in most drinking water in England and Wales. See map for levels of fluoride in UK or detailed maps of worldwide fluoridation incl. UK, Ireland and Spain. Ireland is the only country in Europe that mandates the addition of fluoride to drinking water. In all other European countries fluoridation has been banned or was never implemented. See the following links for more information about the hazards of water fluoridation:
Berkey PF-2 reduction elements are especially designed for use in conjunction with the Black Berkey water filters to adsorb the following unwanted elements found in drinking water.
The number of PF-2's must always correspond with the number of Black Berkey filters installed in the upper chamber. For example: 4 Black Berkeys (2 sets of 2) would require 4 PF-2s (2 sets of 2), and so on.
Under normal conditions we recommend that each set of two PF-2 filters be replaced after approx. 3,785 liters. For instance the Royal Berkey system is about 12.3 liters, therefore the PF-2 filters should be replaced after (3,785/12.3) or 307 refills. If the system is refilled about one time per day, the PF-2s should be replaced after 10 months, if the system is refilled about twice per day, the PF-2s 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.
(Attention: PF-2 filters must be primed before use.)
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. 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.
Our original tests were done using gravity alone to purge the PF-2 filters. Since then, we have added a step by using purging buttons which are much more efficient at removing any residual process dust from the PF-2 media. The test does not distinguish between activated alumina (Al2O3) and Aluminum (Al). So we had to use the total count of aluminum and activated alumina in our tests.
PF-2 filters contain high-grade activated alumina (Al2O3), which currently is the most efficient media available for extracting fluoride from water. Activated alumina is inert. Below are the results we obtained when testing the PF-2 filters (the water was not pre-filtered through the Black Berkey filter elements). The reduction over time is due to additional residual process dust being washed free from the PF-2 filter 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.
While the above results indicate that the residual process dust adds a minute amount of activated alumina to the water, theBlack Berkey water filters 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). Again, the standard tests cannot distinguish between aluminum (Al) and activated alumina (Al2O3), which is inert. Nevertheless, the tests showed a net reduction by the Black Berkey filter element in the combination of naturally occurring aluminum plus any residual activated alumina (Al2O3) process dust from the PF-2 elements.