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PF-4 Fluoride Post Filters for Super Sterasyl and Berkey Earth 2 PACK
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PF-4 Fluoride Post Filters for Super Sterasyl and Berkey Earth 2 PACK

Item # PF-4
Sale price:$99.00

This order qualifies for Free Ground Shipping!
Price is for 2 filters

These filters WILL NOT fit Black Berkey Filters.

PF4 Fluoride reducing Post filters will fit all Doulton and British Berkefeld Super Sterasyl Gravity Filter Elements, as well as Katadyne Ceradyn and Gravidyn Elements.

PF-4 reduction elements, manufactured by New Millennium Concepts LTD 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

PF-4 filters are also designed to adsorb:

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


Assemble the water filter as per the water filter assembly instruction. On the underside of the upper chamber locate the stem of each ceramic filter (do not remove the wing nut holding the ceramic filter in place). With clean hands, remove blue caps and screw a PF-4 filter onto each filter stem (the blue arrow should point away from upper chamber) giving five full revolutions. Do not screw more than five revolutions as this may damage the internal media screen. When complete, seat upper chamber on top of the lower chamber. Fill upper reservoir. When the lower reservoir is full, discard the first batch of water, which may contain process dust. (Note: when lower chamber is full of water, the PF-4 filters will be immersed).


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 150-200 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).


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.)*. Note: do not boil this element.

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