Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,393 pages of information and 211,464 images on early companies, their products and the people who designed and built them.
of Sardinia House, Kingsway, London, W2. Works at Tonbridge, Kent. Telephone: Holborn 5251. Telegrams / Cables: Tubipores, Estrand. (1922 and 1929)
Ditto Address and Telephone, London. Cables: "Tubipores, Estrand, London". Town Mills, Tonbridge, Kent. Telephone: Tonbridge 155. (1947)
A bacterial filter used in 1891, made of earth known as Kieselguhr taken from the name of the mine in Hanover, Germany, from which the earth was found. Ground water at this mine had a clear blue colour suggesting the use of the earth as a filter 
Origin: Berkefeld, name of owner of the mine from which the material to make the filter was taken.
1922 British Industries Fair Advert for "Berkefeld" Filters - best for household and all other purposes. Pure Water. (Stand No. G.13) 
1929 British Industries Fair Advert for filters for 'household and all other purposes'. Manufacturers of Water Filters for High and Low Pressure in Cast Iron, Porcelain Enamelled, Enamelled Iron, Stoneware and Glass. Also Gun-metal, Brass and Copper Nickel-plated. Capacity 5 to 550 gallons per hour. (Pottery Section - Stand No. E.9) 
1937 Makers of water filters and water softeners. "Berkefeld" Filters and Water Softeners. 
1938 At some point in the 1930s the company name was changed to Berkefeld Filters and Water Softeners Ltd. before changing back to Berkefeld Filter Co.
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Stoneware filters and Candles for domestic and laboratory use. Metal Pressure Filters of all sizes for clarification of water for industrial and other uses. Domestic base-exchange Water Softeners. 
See also British Berkefeld Filters