PF-2 Fluoride & Arsenic Filters (2 Sets of 2) for Berkey Gravity Water Systems
FOR BERKEY WATER FILTERS. The number ofPF-2 's must always correspond with the number of Black Berkey filters put in the upper chamber. For example, 4 Black Berkeys (2 sets of 2) would require 4PF-2 s (2 sets of 2).