Coliform bacteria are not pathogenic (disease causing) organisms but are a natural part of the microbiology of the intestinal tract of warm-blooded mammals, including man. Total coliform bacteria are a collection of relatively harmless microorganisms. Coliform bacteria can be found virtually everywhere – in soil, on skin, on animals, insects, in lakes and rivers, etc. […]
We don’t recommend the recycling of the Black Berkey® Purification 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™ elements. […]
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: […]
If you have used your elements: The method of storage depends upon the length of time that the Black Berkey® Purification Elements will not be used: If the filters will not be used between 4 to 15 days and you want to avoid the re-priming process, remove the filters from the system, place them into […]
NSF certifications are not required but rather optional. In our opinion, NSF certifications are limited in their application with respect to our gravity fed purification elements. NSF Standard 42 (aesthetic effects) and Standard 53 (health effects) would specifically apply to our purification elements. NSF Standard 42 covers systems “designed to reduce specific aesthetic or non-health-related contaminants […]
The thread size on the stem of the Berkey Purification Elements is 11 mm.The outer diameter is about 3/8 of an inch and the inner is about 2/8 of an inch.
The washers are made of food grade Neoprene Rubber. However, keep in mind that the washers never touch the filtered/purified water.
Petroleum based products are some of the easiest to remove from water. The Black Berkey® Purification Elements have been tested to remove 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®Purification Elements, click here However, please keep in mind that it […]
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.
There are various plastic materials that can be leeched into water and the most common are BPA ( Bisphenol A) and 1,1-Dichloroethane (11-DCA). The Black Berkey elements have been tested to remove both of these plastic materials. Please refer to our lab testing results by clicking here