Ionia's Best Super-Sanitizing Water Ionizer Filter-Set is a state-of-the-art combination of perfect filtration for drinking water. With the Super-Sanitizing Water Ionizer your source water only flows through the filters when you are making drinking levels of water. When you are making strong alkaline and acidic water the source water is channeled through the saline port of the Super-Sanitizing machine and not through the filters. So, you do not use up your filter-life unnecessarily. It is suggested to minimally change the Super-Sanitizer filter set every year.