So powerful, Berkey® systems are able to remove red food colouring from water without removing the beneficial minerals your body needs. Virtually no other system can duplicate this performance.
Because the Black Berkey™ purification elements are powerful enough to remove red food colouring from water; this feature allows you to test your system to make sure it is operating properly.
Simply fill the upper chamber with water and add a tablespoon of red food colouring for each gallon capacity of your Berkey® system. If the red food colouring is removed entirely, your purification system is working properly. If not, check to make sure that the wing nuts on your elements are securely tightened, then re-run the test.
We recommended that the Red Food Colour Test be run after new systems are first assembled. We also recommend that they are tested every 3 to 6 months, after your system has been in storage or before taking your system on a trip or out of the country, in order to ensure your system is functioning properly.