FREE Lifestraw with every Imperial Berkey PurchaseThe versatile Imperial Berkey? system 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.The Imperial Berkey? system removes viruses, pathogenic bacteria, cysts and parasites and extracts harmful chemicals such as herbicides, pesticides, VOCs, organic solvents, radon 222 and trihalomethanes. It also reduces rust, silt, sediment, foul taste and odors and unhealthy minerals such as lead and mercury. This system is so powerful it can remove red food coloring from water without removing the beneficial minerals your body needs. Virtually no other system can duplicate this performance.Constructed of highly polished 304 stainless steel, the system comes complete with two purification elements and utilizes the latest technological advances. This system has a storage capacity of about 4.5 gallons (17 liters) and when in use it stands 25.75? in height with a diameter of 10?. The upper chamber nests within the lower chamber for transport and stands only 17? in height.Configured with two Black Berkey? Purification Elements the system will purify up to 5.5 Gallons (20.8 liters) per hour*. This system can be expanded to use six purification elements and is capable of purifying up to 16.5 Gallons (62.5 liters) per hour*.* Flow rate calculated with upper chamber full to top. Flow rate decreases as water level declinesThe Imperial Berkey cannot be shipped to California.