In fact, we tested the Berkey Light™ with the maximum pathogenic contamination levels that can be produced in a laboratory. When contamination levels exceed one billion pathogens per liter of water (10,000 times the density of contamination used in the standard test protocol for bacteriological removal) they become too numerous to count (TNTC). Such contamination levels are referred to as "lawn growth". Under normal testing protocol; one pathogenic organism is tested at a time. However, we had the laboratory mix together a soup of three separate pathogenic lawn growth cultures. We then tested the system under this extreme contamination level and absolutely no pathogens were able to make it through the purification elements. We then had the laboratory incubate the water and nothing grew. We then had them view the effluent (filtered water) under an electron microscope and not even in-viable (dead) microbes were detectable. Nothing was present but pure H₂O. You can print a copy of this test report by clicking on the Print Brochures button to the left and click on the "Black Berkey® LSU Report"

How the Berkey Light™ Operates
Berkey Light™ water purifiers are the most practical, user friendly and economical water purification systems available. To use, water is poured into the upper chamber. Gravity draws the water through the exclusive Black Berkey® purification elements. Contaminates are captured on and within the micro-porous purification elements and are separated from the water. The purified water then collects in the lower chamber where it can be drawn through the spigot. While in use, the system is joined together allowing the Berkey Light™ to be transported while it purifies water. This feature is useful when purified water is required in one location, such as in a food preparation area, and later in another location such as a dining area. There is no guesswork when refilling the system because the water level, in both chambers, is visible at all times. The elevated base raises the spigot level, allowing the Berkey Light™ to be utilized anywhere on a flat surface

The shatter resistant and virtually unbreakable Berkey Light™ is made of high impact strength Lexan® which, ounce for ounce, is stronger than steel. In fact, this is the material used for making bulletproof glass. The Berkey Light™ does not leach foul tasting plasticizers into your water and will not retain foul tastes and odors from waterborne contaminants.

The Berkey Light™ is so powerful it can be used to purify non-potable or unhealthy water in situations where electricity and water pressure are not available. For normal everyday situations or for hostile filtration environments, the Berkey Light™ is the most flexible and adaptable water filter available. The Berkey Light™ provides reliable, user friendly, powerful and economical water filtration and enhances the ambience of any environment

Below is Information on the PF-2 Filters:

PF-2^™ reduction elements are designed for use in conjunction with Black Berkey^® water purification elements to adsorb the following unwanted elements found in drinking water.

• Fluoride
• Arsenic V and pre-oxidized Arsenic III
• Other residual heavy metal ions

TECHNICAL INFORMATION:

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).

ARSENIC: This product uniquely targets the entire family of arsenic oxide anions as well as the arsenic cations.

REPLACEMENT:
Under normal conditions it is recommended that each set of two PF-2^™ elements be replaced after 1,000 gallons (3,785 liters). The Royal Berkey^® system is about 3.25 gallons (12.3 liters) therefore the PF-2^™ filters should be replaced after 1,000/3.25 (3,785/12.3) or 307 refills. If the system is refilled about one time per day, the PF-2^™'s should be replaced after 10 months, if the system is refilled about twice per day, the PF-2^™'s should be replaced about every five months). 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.

NOTES:

1) Do not boil this element.

2) PF-2^™ elements reduce filtration flow rate by 15-20%.

3) The media used in the PF-2^™ filter elements contains high-grade activated aluminum oxide, which currently is the most efficient media available for extracting fluoride from water. Below are the results we obtained when testing the PF-2^™ elements (the water was not pre-filtered through the Black Berkey^® elements). The reduction over time is due to additional residual process dust being washed free from the PF-2^™ elements as the system is used. To give a scale for comparison purposes we include test results from a national brand toothpaste and water boiled in an aluminum pan.

• National brand toothpaste 52.878 ppm aluminum
• Water boiled in an aluminum pan for five minutes: 2.791 ppm aluminum
• PF2^™ after conditioning (5 cycles): .178 ppm aluminum
• PF2^™ after 10 Cycles: .037 ppm aluminum
• PF2^™ after 20 Cycles: .029 ppm aluminum

While the above results indicate that the residual process dust adds a minute amount of aluminum to the water, the Black Berkey^® purification elements reduce aluminum from the water. We tested water that naturally contained .320ppm aluminum and filtered it through the combination of the Black Berkey^® and the post conditioned PF-2^™ filtration elements (5 cycles). The results showed a net reduction in aluminum contamination (Raw influent: .320ppm - Effluent after passing through the Black Berkey^® and PF-2^™ elements: .232ppm). In other words the Black Berkey^® elements removed more aluminum from the water than was added by the PF-2^™ elements.

Below is Information on the KDF Shower Filter With KDF-55: