The device will start filtering the water just to make sure that other impurities will go away. After that, you can feel quite free to drink the ionized water even when it comes to the one from the sink. You can go here in order to find out more about this process.
Once you already know about water ionizers and the possibility to include healthy alkaline water for all the members of the family for sure you are asking how this device works. Therefore, it is quite easy to work with such a device and to consider it for your family. You just have to place water inside.