Berkey PF-4 reduction elements, are...
Berkey PF-4 reduction elements, are designed to adsorb the following four unwanted elements most commonly found in drinking water.
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-Heavy Metal Ions
-Herbicides and Pesticides
-Made from safe, non-leaching Polypropolene #5 that is BPA-free
-Sold in a set of 4
-PF-4 Fluoride and Arsenic Reduction Filters are designed to be used in conjunction with the White Super Sterasyl Ceramic Filter Elements only
-Attach to the bottom of the White Super Sterasyl Ceramic Filter Elements and sit in the lower chamber of the Berkey unit
-Number of PF-4s in the bottom chamber must match the number of White Super Sterasyl Ceramic Filter Elements in the top chamber; for example, 4 White Super Sterasyl Ceramic Filter Elements would require 4 PF-4 Filters
-PF-4 Filters need replacement after 1000 gallons or every six months, whichever comes first