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  • Replacement PF-4 Fluoride Filters (2 items)- For Berkey Water Filtration System filtering fluoride, lead, arsenic, and sediment - BerkeyFiltersUSA


Replacement PF-4 Fluoride Filters for Ceramic & Earth Berkeys (1 PAIR)

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  • I have heard that the fluoride filter only gets rid of some of the fluoride. How much can I expect to be left in the water I drink?

    Hi Here is the information provided by the manufacturer on the effectiveness of the Berkey fluoride filters. "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)." I hope this helps!

  • Where are the test results for the BF-4 filter? What exactly do the test results for the Black Berkey filter cover? Is it just that filter or is it representative of a combination of the filters? Example, The Black Berkey Filter plus the BF-4 filter equals the posted test results that are posted on the Black Filter page?

    Hi - those are great questions! First, the PF-4 filters only fit the Super Stearasyl and the Earth filters. The manufacturer has not made the fluoride filter test results directly available. The Black BB9 filter test results can be found here:

    The results in that report are the BB-9 black Berkey water filter results only. Hope this helps!

  • Difference in fluoride filters available

    That is a great queation! There are two types of fluoride filters they differ in the main filters they fit. The PF-2 fluoride filter will fit the Black BB9 main berkey water filter. The PF-4 fluoride filter will fit both the Ceramic Super Stearaysl and the Berkey Earth water filters (7-inch and 9-inch versions all fit the PF-4 fluoride filters). Thank you so much for your question. Have a great day!


Fluoride Reducing Berkey Filters - Berkey PF4

Berkey PF4 fluoride filters for use with these Berkey water filters when fitted with Ceramic filters or the newest Berkey DIATOMACEOUS Earth Premium Filters:

  • Travel Berkey Water Filter
  • Big Berkey Water Filter
  • Berkey Light Water Filter
  • Royal Berkey Water Filter
  • Imperial Berkey Water Filter
  • Crown Berkey Water Filter

Berkey Filters PF-4 fluoride filters are designed for use in conjunction with Berkey Super Sterasyl Ceramic Filters or the Berkey Diatomaceous Earth Premium Filters. They are incompatible with BB9 Black filters.

  • Sold in a set of 2 Berkey Filters
  • Fluoride Reducing PF4 Fluoride Filters are made from safe, non-leaching BPA-free Polypropolene #5
  • PF4 Fluoride Berkey Filters are designed to be used in conjunction with Super Stearasyl Ceramic filters only
  • Attach to the bottom of the Cerami Filter Elements and sit in the lower chamber of the Berkey Water Filter assembly
  • Number of PF4 Berkey Filters in the bottom chamber must match the number of Ceramic Berkey Filter Elements in the top chamber; for example, 4 Ceramic Berkey Filter elements would require 4 PF4 Berkey Filters
  • The PF-4 Berkey Filters should be replaced at every 500 gallons of use.

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