Berkey® Systems: Same Great Performance, Special Price! Berkey® systems may be scratched or dented. Systems ARE NOT warrantied against cosmetic defects. Specifications for the Travel Berkey® System. The 1.5 gallon Travel Berkey® System comes standard with 7 British Berkefeld Ceramic Filters, and is ideal for 1-3 people for everyday use. Holds up to 1.5 gallons of purified water. 7 British Berkefeld Ceramic Filters. System is 7.5″ in diameter x 18″ in height. AISI 304 stainless steel construction. Included in the box. Upper and lower chambers. 1 stainless steel lid, knob and screw. 2 wing nuts, 2 washers.