Using 1/2 teaspoon of red food dye per gallon of water will give you 3 tests.
You receive 1 - McCormick Culinary Artificial Red Food (Dye) Color, 1 oz. (30ml) Dropper Bottle.
- FD&C Reds 40 & 3
- Propylene glycol
- Start with an empty system (upper and lower chamber) and remove any Berkey PF-2™ Fluoride and Arsenic Reduction Filters(if installed). The Berkey PF-2™ Fluoride and Arsenic Reduction Filters must be removed prior to performing a red food coloring test in order to stay in compliance with the six month warranty on the Berkey PF-2™ Fluoride and Arsenic Reduction Filters .
- Place the upper chamber only (with the elements installed) on similar- sized cups directly underneath each Black Berkey™ This will help isolate which filter may be exhausted and which is still purifying effectively.
- Fill the upper chamber with water and add up to 1 teaspoon(max) of ARTIFICIAL red food coloring for every gallon of water. (hint - 1/2 teaspoon per gallon of water is plenty to carry out the test)
- Allow the water to run through to the bottom chamber.
- If the red food coloring is removed entirely, your purification system is working properly.
- If the water in any of the cups is red or has a pinkish tinge, then that particular black filter is defective or exhausted.
How can I tell if my Black Berkey Elements are working correctly? (Red Dye Test)