Indicates water is being ionized and the water being produced is Alkaline and Acidic. When the Purified Water Indicator Light is On, the water from the nozzle is only filtered. The water is filtered for chlorine, certain impurities, bad tastes and odors. They have no monitoring of the filter and it's use. Everyone uses a different amount of water.
Larger families use more water than single households.
First , this gives you the ability to clean your unit more frequently or for a longer period. Secondly , because Acidic water flows out the top stainless steel nozzle when cleaning, you can also use this button when you want the convenience of having Acidic water out the nozzle. To turn off the cleaning button and return Alkaline water flow out the top stainless steel nozzle, simply press the Clean button again. As you go up from level to level you are increasing the pH of the water, and increasing the electrons or negative ions in the water.