Below are the available bulk discount rates for each individual item when you purchase a certain amount
"PF-2 reduction elements are designed for use in conjunction with Black Berkey water purification elements to adsorb the following unwanted elements found in drinking water:
Under normal conditions it is recommended that each set of two PF-2 elements be replaced after 1,000 gallons. The Royal Berkey system is about 3.25 gallons therefore the PF-2 filters should be replaced after 1,000/3.25 or 307 refills. If the system is refilled about one time per day, the PF-2's should be replaced after 10 months, if the system is refilled about twice per day, the PF-2's should be replaced about every five months). Actual capacity is dependent on the presence of other competing contaminants in the source water. High levels of Fluoride, arsenic and heavy metals may reduce the capacity and efficiency of the elements."
~ New Millennium Concepts, Ltd.
Click here to view a brochure of these elements. It contains many facts along with priming and installation instructions. For more information on these elements and other Berkey products, please visit the Berkey FAQ