How long does it take for the water to flow from the upper tank to the lower tank?

The upper container of your BOROUX water filter should be completely flushed (a small layer will remain) in about 2 hours on average. The more successful the priming is, the faster the flow rate will be. So if it takes well over 2 hours, we recommend priming again. If this is the first time, priming is not expected to have been successful and there is still too much air in the BOROUX Foundation™ Black filter elements. In case of longer use, this is a sign to prime again.

In fact, priming causes the air to leave the filters again, which means they will start running again faster. You can use the Priming Button, the Black Berkey Primer Whether the blue Primer Rite use. See also the instructional videos.

Is it your first time using the BOROUX Legacy™ water filter? If so, the following is equally important:
- the filtration rate will increase somewhat in the first 12 to 24 hours.

Should the speed remain low, and should there therefore still be quite a bit of water left in the upper container, after well over 2 hours. Then take contact with us and we will be happy to help you.