British Berkefeld, or "Berkey"
This cutaway graphic shows the two compartments, each of which hold 8 litres.
When ordering replacement filters for this system we recommend you order our standard sized Doulton filter, which is the same Doulton Supersterasyl filter, only in a different size and shape. We find the shorter, wider filter means it stays under the water surface longer for faster filtering. You do not need to soak or prime the Doulton filters.
Contain inert high-grade activated alumina, the most efficient way for extracting fluoride from drinking water. These element works in conjunction with a Doulton filter, and will reduce these unwanted impurities by "absorption".
Fluoride by: >95%, Lead, Arsenic, MTBE, DBCP, THM's, Herbicides+Pesticides, & heavy metal ions.
*Arsenic: This product uniquely targets the entire family of arsenic oxide anions as well as the arsenic cations.
*Lead: Tests have shown that when 7,500 litres of influent water at a concentration of lead of 150-200 ppb pass through 200 grams of media at a flow rate of 1gp , the lead level was reduced to less than 1ppb (99% reduction).
*MTBE (Methyl-terteiary-butyl-ether): Berkey PF-4™ elements are manufactured to exceed ANSI/NSF standard 53 which requires that MTBE be reduced by at least two thirds from an influent rate (water going out) of less than 5ppb (>95% reduction*) *Actual capacity is dependent on the presence of other competing contaminants in the source water. High levels of total organic carbons and volatile organic compounds may reduce the capacity and efficiency of the elements.
Under normal conditions it is recommended that each PF-4™ element be replaced after 1,000 litres (or 2,000 ltrs if you are using two elements in your system). If you consume about 5 litres a day of filtered water you would need replacement every 6 months in a system using 1 filter and 1 element at a time. Every 12 months if using a system which uses 2 filters and 2 elements. 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.
Caution: Filters Must be Primed BEFORE USE!
Do not install PF-4™ Elements before reading Installation Instructions.For use with Durand Fluoride Reduction Systems or British Berkefeld Stainless Steel Systems. To be used in conjunction with a Doulton Super Sterasyl Ceramic Filter.