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"H. Storage capacity of about 4.5 gallons (17 liters) . 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. For normal everyday use, this system easily serves 4-8 people.
eBay