Authentic 4.5 gallon Imperial berkey gravity fed water purification system. Eden valley farms has been a authorized berkey dealer for 15 years. We don't sell chinese knock offs or fraudulaunt product. We specialize in manufacturing the best dried food on the planet earth and helping people prepare for uncertain times and water preparation in so important in that process and berkey is the best in the business when it comes to water purifacation. Call us today for a appointment, availability or for questions we would love to help you prepare. #801-668-7272 Product Description *The Berkey® stainless steel chambers are assembled in the USA from US and imported parts. The Black Berkey® Elements are made and assembled in the USA. The Imperial Berkey® System comes standard with 2 Black Berkey® Elements, but can be expanded up to 4 or 6 elements. The versatile Imperial Berkey® System is the ideal system for use with mid to large-sized families, and small groups. Constructed with highly polished AISI stainless steel Upper chamber nests within lower chamber for transport and stands only 17 in height Storage capacity of about 4.5 gallons (17 liters) Maximum Filters: 6 Black Berkey® Elements (in upper chamber) System includes upper and lower stainless steel chambers, 2 Black Berkey® Elements (expandable to 4 or 6), 1 stainless steel lid, 2 washers, 2 wingnuts, 4 blocking plugs, 1 priming button,1 spigot, 1 rubber gasket to protect the base Height when in use: 26 Diameter: 10 Weight: 10 lbs empty For normal everyday use, this system easily serves: 4-8 people Fully configured, this system can serve up to 200-400 people a day, during an emergency Maximum Filtration Flow Rate: Configured with 2 Black Berkey® Elements, the Imperial Berkey® System can produce up to 5.5 gallons (20.8 liters) of filtered water per hour Configured with 6 Black Berkey® Elements, the Imperial Berkey® System can produce up to 16.5 gallons (62.5 liters) of filtered water per hour Up to 6 Berkey PF-2™ Fluoride and Arsenic Reduction Elements can be installed in the lower chamber if desired Flow rate calculated with upper chamber full to top. Flow rate decreases as water level declines.