Why do your instructions say : “Do not allow filter to freeze?”

We strongly advise against freezing your elements as a general rule of caution. We also advise against storing the elements (even unused) in sub-freezing climates. The concern with freezing the elements is that any cold or freezing water will expand inside in the element, thereby increasing the pore size and ruining the element. Whether the […]

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Are the Black Berkey® Elements or Berkey PF-2™ and PF-4™ recyclable?

We don’t recommend the recycling of the Black Berkey® Elements, PF-2s or PF-4s. The shells of the Berkey® PF-2™ and PF-4™ are made of Polypropylene, which is Recycle Code 5. Uses of Polypro (for short) include catsup bottles, yogurt containers, margarine tubs & medicine bottles.  However, there is no recycle code for the Berkey PF™ […]

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Why do the log reduction levels differ for varying Berkey® element tests? Some laboratory results show testing to greater Log reduction (example: 99.9% vs. 99.99999%) than others.

“…The quantitation limit of an individual analytical procedure is the lowest amount of analyte in a sample which can be quantitatively determined with suitable precision and accuracy. The quantitation limit is a parameter of quantitative assays for low levels of compounds in sample matrices, and is used particularly for the determination of impurities and/or degradation products…”  REFERENCE: […]

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Are the Black Berkey® Elements NSF certified?

NSF certifications are not required but rather optional. In our opinion, NSF certifications are limited in their application with respect to our gravity fed filtration elements. NSF Standard 42 (aesthetic effects) and Standard 53 (health effects) would specifically apply to our filtration elements. NSF Standard 42 covers systems “designed to reduce specific aesthetic or non-health-related […]

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Will the Black Berkey® Elements remove kerosene?

Petroleum based products are some of the easiest to remove from water. The Black Berkey® Elements have been tested to reduce the following petroleum contaminants up to 99.9%: Gasoline Diesel Crude Oil Kerosene Mineral Spirits Refine Oil For complete lab results on the Black Berkey® Elements, click here However, please keep in mind that it […]

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Do the Black Berkey® Elements remove lithium?

It is our understanding that Lithium is an alkali metal, found in Group 1 of the Periodic Table. Lithium can be very reactive when exposed to water. Current testing of this potential contaminant has not been conducted, at this time.

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