• The Imperial Berkey System comes standard with 2 Black Berkey Purification 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, small groups and during unexpected emergencies
• 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 Purification Elements (in upper chamber)
• System includes upper and lower stainless steel chambers, 2 Black Berkey Purification 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 Purification Elements, the Imperial Berkey System can produce up to 5.5 gallons (20.8 liters) of purified water per hour
  • Configured with 6 Black Berkey Purification Elements, the Imperial Berkey System can produce up to 16.5 gallons (62.5 liters) of purified 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.