*This is for the Berkey Earth Filters or White Ceramic Filters(Super Sterasy) only.

*If you have Black Berkey Element Filters(regular filters come with the unit), then you need to get PF-2 instead.

• PF-4 Fluoride and Arsenic Reduction Filters adsorb the following unwanted elements found in drinking water:
• Fluoride
• Arsenic
• Lead
• Heavy Metal Ions
• MTBE (Methyl-tertiary-butyl-ether)
• Trihalomethanes (THM)
• DBCP (Dibromo-chloro-propane)
• Herbicides and Pesticides
• Made from safe, non-leaching Polypropylene #5 that is BPA-free
• Sold in a set of 2
• PF-4 Fluoride and Arsenic Reduction Filters are designed to be used in conjunction with the Berkey Earth Elements or the Super Sterasyl Ceramic Filter Elements 
• Attach to the bottom of the Berkey Earth Elements or the 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 Berkey Earth Elements or Super Sterasyl Ceramic Filter Elements in the top chamber.
• PF-4 Filters need replacement after six months

*This is for the Berkey Earth Filters or White Ceramic Filters(Super Sterasy) only. Not for regular black filters come with the systems.