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#berkefeld_filter

Berkefeld filter

Water filter made of diatomaceous earth (Kieselguhr)

A Berkefeld filter is a water filter made of diatomaceous earth (Kieselguhr). It was invented in Germany in 1891, and by 1922 was being marketed in the United Kingdom by the Berkefeld Filter Co. Berkefeld was the name of the owner of the mine in Hanover, Germany, where the ceramic material was obtained.

Wed 14th

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