No. On the one hand, the positions of each filter are not interchangeable, and on the other hand, they do not serve the same purpose. They are complementary. When the Berkey® PF-2™ water filters are installed, the water first flows from the upper chamber through the Black Berkey® purification elements, then into the Berkey PF-2™ filters, and finally into the lower chamber.

The former have a purification role by removing all harmful elements from the water, while the latter are specialized in retaining fluoride and arsenic.