Enhance Your Berkey® Filtration SystemThe Berkey® PF-2™ Fluoride and Arsenic Reduction Elements are designed for use in conjunction with the Black Berkey® Filtration Elements to further reduce specific unwanted substances from your drinking water. These post-filters install easily onto the stem of each Black Berkey® Element and help support improved water quality through additional filtration. Smart, Easy ReplacementEach pair of PF-2™ Elements is recommended for replacement after approximately 1,000 gallons of use under normal conditions. The compact, inline design keeps your Berkey® System efficient and easy to maintain. Genuine Berkey® QualityThese are genuine OEM components manufactured by NMCL and tested by independent laboratories. As with all Berkey® accessories, the PF-2™ Elements are designed to provide performance, reliability, and peace of mind.