This set includes the four filter stages that require 6-monthly replacement.* The set comprises:
1st Stage - 5 Micron Sediment Inline Filter
2nd Stage - Activated Carbon Inline Filter
3rd Stage - Activated Carbon Inline Filter
5th Stage - Post Carbon Filter
The TFC Membrane is not included as it only requires replacement every 12 months
The UV bulb is also not included and must be bought separately for those M-Series with UV lights.
* Cartridge longevity and performance depend on water usage and level of contamination.