The Doulton British Berkefeld gravity water filter system is purposely designed for situations in which a safe and reliable source of drinkable water is not available making it ideal for outdoor travelers, hikers, expeditions, missionaries etc. due to their effectiveness at eliminating water-borne diseases such as cholera and typhoid, they are also being specified for field operations by many of the world's major aid and emergency relief organizations as well as the US Military.

British Berkefeld Gravity Systems

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