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 Bottle is FDA LDPE The Cap is FDA HDPE The Straw is FDA PolyPro Please note that the number imprinted on the bottom of the Sport Berkey® refers to a lot number and is not a recycle code.
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.