2 Berkey PF-4 Fluoride Filters K5350B (For Ceramic Elements)


* Set of 2 Berkey PF-4 Replacement water filters. Reduces fluoride, arsenic, MTBE, Lead
* For use with gravity filter systems that use ceramic filters
* Will fit on British Berkefeld and Doulton ceramic filters
* Used as a post filter, these screw onto the bottom of your ceramic filters
* Will NOT fit Black Berkey filters. Only fits white ceramic filters.

Technical Specifications: 

MTBE: The PF-4 is manufactured to exceed ANSI/NSF Standard 53 which requires that MTBE be reduced by at least two thirds from an influent rate (water going in) of 15ppb to an effluent rate (water going out) of less than 5ppb (> 95% reduction*). 

LEAD: Tests have shown that when 2000 gallon (7,600 liters) of influent water at a concentration of lead of 200 ppb pass through 200 grams of media at a flow rate of 1 gpm (3.8 lpm), the lead level was reduced to less than 1ppb (>99% reduction). 

FLUORIDE: Testing for fluoride was based on 20-30ppm of the ion in the influent aqueous solution at a flow rate of no more than 3 gpm (11 lpm) per cubic foot of media. Results of < 1ppm of the fluoride ion in the effluent were typical for the media (>95% reduction). Under optimum conditions, effluent concentrations of less than 50 ppb were readily achieved (>99.75% reduction). 

REPLACEMENT: Under normal conditions it is recommended that 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.)