When determining the best size for your situation, please consider that the larger the systems capacity, the less often it will need to be refilled. All of our systems available are configured with two Black Berkey® Purification elements, however; the four larger stainless steel systems are expandable which means that your first consideration should be to purchase the system, which has the capacity to best meet your groups needs. If at a later date you determine that you require more gallons per hour, you will not have to invest in another system, you can simply order additional purification elements to expand your current system. Below is a chart of our various two element systems, their water storage capacities, and the maximum number of elements each system can be expanded to accommodate.
The chart below shows the flow rate measured in gallons per hour for each system, when configured with two Black Berkey® purification elements and when expanded to accommodate the maximum number of elements. Flow rates calculated with upper chamber filled to top. Flow rate decreases as water level declines.
Travel Berkey
Berkey Light
Big Berkey w/ 2 element
Big Berkey w/ 4 elements
Royal Berkey w/2 elements
Royal Berkey w/4 elements
Imperial Berkey w/2 elements
Imperial Berkey w/4 elements
Imperial Berkey w/6 elements
Crown Berkey w/2 elements
Crown Berkey w/4 elements
Crown Berkey w/6 elements
Crown Berkey w/8 elements
