Berkey PF-4™ reduction elements are designed for use with Super Sterasyl^™ ceramic filtration elements to adsorb the following four unwanted elements most commonly found in drinking water.

• MTBE (Methyl-tertiary-butyl-ether)
• Fluoride
• Lead
• Arsenic

Berkey PF-4™ filters are also designed to adsorb:

• DBCP (Dibromo-chloro-propane)
• THMs (trihalomethanes)
• Herbicides & Pesticides 
• Heavy Metal ions

REPLACEMENT:

Under normal conditions it is recommended that Berkey PF-4™ elements be replaced at six-month intervals (Actual capacity is dependent on the presence of other competing contaminants in the source water. High levels of total organic carbons, volatile organic compounds or certain inorganic minerals may reduce the capacity and efficiency of these elements.)*. Note: do not boil this element.