The versatile Imperial Berkey water filter is the ideal system for use with small to medium sized groups, at home, churches, hospitals orphanages, for outdoor activities or during unexpected emergencies. This powerful system purifies both treated water and untreated raw water from such sources as remote lakes, streams, stagnant ponds and water supplies in foreign countries, where regulations may be substandard at best. Perfect for outdoor activities and a must in hostile environments where electricity, water pressure or treated water may not be available. This system removes pathogenic bacteria, cysts and parasites entirely and extracts harmful chemicals such as herbicides, pesticides, VOCs, organic solvents, radon 222 and trihalomethanes. It also reduces nitrates, nitrites and unhealthy minerals such as lead and mercury. This system is so powerful it can remove food coloring from water without removing the beneficial minerals your body needs. Virtually no other system can duplicate this performance. Imperial Berkey Specifications Constructed of highly polished 304 stainless steel, the Imperial Berkey system comes complete with two purification elements and utilizes the latest technological advances. * Storage Capacity = 4.5 gallons (17 liters) * Height = 25.75" * Diameter = 10" * Portability = The upper chamber nests within the lower chamber for transport and stands only 17" in height. * Flow Rate o Configured with 2 Black Berkey purification elements the system can purify 5.5 Gallons per hour. o Configured with 6 Black Berkey purification elements the system can purify 16.5 Gallons per hour.