As water is poured into the upper chamber, the natural Berkey Water Filter works. Via the Black Berkey exclusive purification elements, Gravity draws this water where pollutants are captured on and inside these microporous elements and isolated from the water. In the lower chamber, the filtered water then accumulates where it can be drawn through the spigot. The higher the water volume and the number of Black Berkey Filter Components, the faster the filtered water flow rate is.

What’s more, the Black Berkey components can be washed and used again and again.

The table below shows the flow rate of purified water per system configured with the standard 2 filters and when the same system is fully expanded. All systems, except the Berkey Go, function with a minimum of 2 filters.

The best guideline for selecting which Berkey Water Filter size is suitable for you is that it is generally safer to give you the room for it to be larger. That basically means that having a larger device is more convenient as you won’t have to fill it up as much. Since the higher volume of water in the upper chamber raises the pressure on the filters, the water flows faster.

The cost variations between the different models are small when you remember that for 10-20+ years you will be using the same model. We know this is an investment but in the long run it will be on the cheaper side 🙂