Berkey PF-2 Fluoride / Arsenic Filter (Set of 2) - Fits Black Berkey Purifiers Only
Removes: Fluoride, Arsenic V and pre-oxidized Arsenic III, as well as other residual heavy metal ions.It is recommended that each set of two PF-2 elements be replaced after 1,000 gallons. As an example, The Royal Berkey system is about 3.25 gallons and therefore the filters should be replaced after 307 (1,000/3.25 ) refills. Or in other words, If the system is refilled about one time per day they should be replaced after 10 months, if the system is refi ...