The following filters are included and are packed fresh the day you order:

Re-calibration can be done separately or each line

The color changes from blue to amber as the resin exhausts

This is your house PSI

Always from reputable manufacturers

Softening Filter In-Line FilterPacks The following filters are includedInline Water Softening Filter Introducing Air, Water & Ices in line water softening filter! If you dont already have a water softener in your house, and youre looking to invest in a water softener, then this is the filter for you. Consider adding this softening filter as a pre filter in front of your RO unit. Not quite the right filter for your system? Please check out all our filters here. How the Inline Water Softening Filter Works: The filter works