We’re glad your enjoying you ceramic filter / PF-4 setup. Please keep in mind that the PF-4’s need to be replaced every 6 months regardless of gallons filtered. A set of PF-2’s (used with the black berkeys) need to be replaced every 2 years or 1000 gallons. Due to the longer life of the PF-2’s, the black berkey / PF-2 combination is typically less expensive over the long run. However, both are great setups and they really do help us reduce our bottled water consumption. We think that’s a great thing!

We love our filter. We no longer can stand tap water and use stainless water bottles for the kids. I feel better not buying bottled water and adding more plastic to the oceans and dumps.

Black Berkey’s are manufactured in the US and have thus only been tested in the US to date. Two labs have tested these filters.

1) Spectrum Labs - They provide services to the environmental, municipal, industrial, and research communities for detecting and monitoring pollution. Known as the technical leader in analytical chemistry, Spectrum has been in business for over thirty years.
2) University of Arizona - Department of Soil, Water, and Environmental Science - WQC (Water Quality Center) Lab

Both are well respected labs. The food coloring test is a good real world example of the high quality of the black berkey’s purification ability.

Dan

U.S. testing standards are not always reliable (IMHO) compared to many years of tried & true testing of the ceramics. I do want to choose the best one… can you confirm whether most/all of the quality testing on the BB is done in the U.S.?