PF2 Berkey Fluoride Filter FAQ

The length of each PF-2 Fluoride Filter is 6" with a diameter of 2.5". When the elements are attached to the stems of the Black Berkey Filters, in the system, the Fluoride element extends down into the lower chamber approximately 7.5". The threaded hole side of the Berkey PF-2 Elements that attaches to the Black Berkey® Purification Elements is 11mm.

No. The activated alumina in the post filter media is not treated with cyanuric acid, nor does it contain any cyanuric acid in the media.

The elements can be adjusted by either turning them more revolutions or less. If the elements are screwed on too tight, the screen within the post filter can become damaged. This will not negatively affect the performance of the element. The only purpose for the screen is to keep the media within the element during shipment. Secondly, a “lock” condition can occur, where upon the water coming through the element and post filter will stop flowing into the bottom chamber once the water level reaches the bottom of the post filter. To solve the lock condition, the post filter needs to be loosened slightly so that enough water can escape to prevent pressure from building up within the post filter element(s). In other words a small amount of “burping” (spill) is necessary for the elements to perform properly. To obtain optimum flow without a lock condition and to not have excessive water seepage, you can adjust the post filters a bit each way, to reach a proper balance. Again, the number of turns is a guide. If it appears that too much water is seeping between the threads, the post filter can be tightened a bit more, using care to not overt-tighten. If the system air locks, then the element(s) should be unscrewed a bit.

No the Black Berkey® Purification Elements fit into the base of the upper chamber with the threaded stems of the filters protruding through the holes in the base of the upper chamber. The PF-2® filters screw onto these threaded stems so that the Berkey PF-2®’ Elements hang down into the interior of the lower chamber. The water flows from the upper chamber, through the Black Berkey® Purification Elements, into the Berkey PF-2®’ Elements and then into the lower chamber. The “PF” in PF-2 stands for Post Filter. So, they do not replace the black filters but rather work in conjunction with them.

Our most recent laboratory testing indicates that the Black Berkey® Purification Elements reduce Arsenic and fluoride up to 99.9%. Typically carbon based elements that reduce Arsenic and Fluoride begin to lose that ability rather quickly. This is likely the case with Black Berkey® Elements, which means that their efficiency at removing Arsenic likely plays out long before the 3,000-gallon life of the element. For that reason, a more durable and longer lasting solution for Arsenic and Fluoride reduction was developed by creating the replaceable Berkey® PF-2® Fluoride and Arsenic reduction elements. The media in a set of Berkey® PF-2® elements can reliably remove Arsenic and Fluoride contaminants for up to 1,000 gallons, which is less than the 3,000 gallon life of the Black Berkey® Elements but again, that is why they were designed to be replaceable. This enables the users to reliably remove Arsenic and Fluoride contaminants from their water while taking full advantage of the 3,000 gallon life of their Black Berkey® Elements. The Black Berkey® Purification Element’s job is to remove a wide variety of potential contaminants, while the Berkey® PF-2® Post Filter’s job is to remove Fluoride and Arsenic contaminants that the Black Berkey® Purification Elements may begin to miss after extended use. Actual reduction capability 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 these elements.

No. The Berkey fluoride reduction filters should only be used if you are on city water, you have confirmed with your city that they are adding fluoride to the water and you want to remove the fluoride. The PF-2 elements are not needed if you are on spring water.

High or low PH impedes the ability of the media to remove fluoride. For maximum removal efficiency, maintain the water being treated between a pH level of 5 and 7. Actual capacity is dependent on the level of contamination of arsenic, fluoride, and other competing heavy metal ions. Unusually high levels of these contaminants may reduce the capacity and efficiency of the elements.

Unused Berkey PF-2 Fluoride Filters theoretically have an indefinite shelf-life when stored in their original packing. It is best to keep them stored in a cool dry place where they will not be exposed to the weather elements.

If you have used the Berkey PF-2® Elements and need to store them, place the filters into a seal-able container, such as a sandwich bag. They can then be placed on the door of your refrigerator or towards the front. It is important to put them in an area they will not freeze. The filters can be stored in this manner for 2 weeks. When you are ready to use the elements again, we recommend re-priming the Berkey PF-2® post filter elements for 1 minute each, in both directions, before using them again. NOTE: The Berkey PF-2® elements should never be allowed to air dry. This could allow some bacteria growth in the media to occur. Replacements would be necessary.

The media used in our Fluoride filter elements can contain a small amount of harmless process dust or fines, due primarily to assembly, handling and shipping of these elements. For aesthetic reasons, we recommend the Berkey® Post Filter elements be primed to remove the majority of this process dust, prior to installing these elements in your Berkey® system. If the Berkey® Post Filter elements are not primed prior to use, the possibility of turbidity in the first few cycles of water may occur. For the sake of simplicity, turbidity appears as cloudiness in the water. In other words, the process dust/fines are what cause the cloudiness. For example, manufacturer had the Fluoride filter elements tested to determine at what level the turbidity falls off. The results were as expected. The laboratory tested the turbidity remaining after priming the Berkey® Fluoride Filter elements (as described in the assembly instructions). The results show that the levels of turbidity drop off dramatically if the priming process is followed. It is recommended that the Fluoride filter elements be primed for approximately 30 seconds in each direction, prior to installation. For those purists, this priming process can be repeated an additional one or two times before installation. Our lab tests determined that the turbidity drops off as follows: One priming: Turbidity reduced by >94% Two primings: Turbidity reduced by >96% Three primings: Turbidity reduced by >98% The turbidity will continue to decline with each refill cycle of your Berkey® system. While turbidity may be aesthetically unpleasing, according to current research, there are no negative health effects with which to be concerned.

Each set of two Berkey PF-2® Elements will last for approximately 1,000 gallons of water or one year, whichever comes first. The best way to gauge when to replace the Berkey PF-2® Elements is to do the following: 1) Keep a track of how many times per week you need to refill your system. 2) Then multiply that figure times the capacity in gallons of your particular system (for example the Berkey light® system is 2.75 gallons) to determine Total Gallons Used Per Week. 3) Finally divide the Total Gallons Used Per Week into the 1,000 gallons and that will tell you how many weeks before the filters should be replaced. 4) Next calculate the future date for replacement (52 weeks per year) and write that date on a sticker and attach it to the bottom of your system for future reference. If you have been using your fluoride reduction filters for some time now, you can still use the above formula to determine when to replace the filters. Just count forward from the date you purchased your filters.

For information on the reduction media utilized by the PF-2 Fluoride Filters, click the link below. PF2 Fluoride Reduction Media Extract

Our PF-2 filters reduce fluoride and arsenic in your water using the media aluminum oxide (aka activated alumina). As a consumer, it’s important to know that pure aluminum and aluminum oxide have vastly different characteristics. Pure aluminum is water-soluble, it is highly reactive and it is associated with negative health effects. By contrast aluminum oxide is not water-soluble; it is inert, is very stable and is not associated with negative health effects. To learn more about aluminum oxide and separate fact from fiction, view the link here

The PF-2 Fluoride Filters are made from BPA free non-leaching #5 polypropylene. This is the same material that is used for most ketchup bottles and yogurt containers. The granulated media within the filter is activated alumina, also known as aluminum oxide. As a consumer, it’s important to know that pure aluminum and aluminum oxide have vastly different characteristics. Pure aluminum is water-soluble, it is highly reactive and it is associated with negative health effects. By contrast aluminum oxide is not water-soluble; it is inert, is very stable and is not associated with negative health effects.

In order to use your Berkey PF-2 Fluoride Filters for the first time you must prime them. The filtering media contained in the element is very dense and contains dust from the manufacturing process. This dust needs to be rinsed from the media in order for the water to run clear and to break the surface tension of the filtering media. Please follow the instructions below in order to get the best results possible from your Berkey water filtering system. Click here to watch how to prime the PF-2 Fluoride Filters. PF-2 Priming Instructions Caution: When screwing the element onto the Black Berkey filter do not exceed 8 revolutions or the threaded portion of the filter will protrude too far into the fluoride filter and possibly damage the filter. Step 1: With the blue caps in place wash the exterior of each PF-2 fluoride element with water and a mild dish washing soap, then rinse. Step 2: With clean hands, remove both blue caps from each end of both filter elements. Step 3: Place the rubber priming button (tan colored) onto one end of a PF-2 and align the hole of the filter with the hole of the rubber washer. Step 4: Press the priming button up against the sink faucet so that the priming button creates a seal between the faucet and the PF-2 element. Step 5: While holding the priming button against the faucet, turn on the cold water slowly, allowing water to fill the cavity of the filter and discharge from the opposite end. Allow water to flow through the filter until it runs clear. This may require several attempts. Hint: place thumb on top of the faucet to apply pressure, this creates a better seal. Step 6: Turn the Pf-2 filter over and prime the opposite end (reversing the flow of water) repeating steps 3 thru 5 until water runs clear from both directions. Step 7: When you think the filters are flushed long enough, run some of the water that is being flushed through the filter into a clear glass and hold it up to the light to see if all of the cloudiness is gone from the water, if not continue priming until water is clear.  Step 8: Prime your second PF-2 element as described above. Step 9: Now that the water is running clear through the PF-2 Fluoride Filters, they are is successfully primed and ready to install.

When adding the PF-2 fluoride reduction elements by threading them onto the stems of the Black Berkey® purification elements, they are effective at removing the contaminants below. Fluoride Pre-oxidized Arsenic III and Arsenic V MTBE Other heavy metal ions The PF-2 fluoride reduction elements reduce naturally occurring fluoride as well as fluoride that has purposely been added into municipal water sources by treatment plants. The fluoride reduction elements are a post filter to the Black Berkey filters and are compatible with all Berkey water filter systems excluding the GO Berkey.

Cloudy water is a sign that the PF-2 Fluoride Filters need additional priming. The cloudiness is caused by residual process dust within the capsule of the filter. Please continue with the following instruction. The priming process may need to be repeated more than once to completely remove any residual manufacturing dust. 1. Plug one end of the fluoride filters with the blue caps they come with initially. If you do not have the blue caps, your thumb will do. 2. From the uncovered end, fill the capsule part way with water and cap/plug both ends. 3. Moderately shake the filters to loosen any residual process dust that may be trapped within the filter. Gently tapping the PF-2 element on the counter a few times will also help to loosen any excess manufacturing dust. 4. Remove both blue caps from the ends of the PF-2 element and empty out any residual water. 5. Next, re-prime the filters following standard procedure. a. Place the rubber priming button (tan colored) onto one end of a PF-2 and align the hole of the filter with the hole of the rubber washer. b. Press the priming button up against the sink faucet so that the priming button creates a seal between the faucet and the PF-2 element. Place thumb on top of the faucet to apply pressure, this creates a better seal. c. Turn on the cold water slowly, allowing water to fill the cavity of the filter and discharge from the opposite end. Allow water to flow for one to two minutes or until water runs clear, whichever is longer. d. Turn the Pf-2 filter over and prime the opposite end (reversing the flow of water) repeating steps a. thru c. until water runs clear from both directions. e. To determine if more priming is necessary, run additional water through the element and using a clear glass, collect the water discharging from the opposite end. If the collected water still appears cloudy, continue priming until the water is clear. Note: Do not immediately discard the priming button or blue caps as you may need them in the future to re-prime the elements.

Fluoride Filter Test Results

 

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