STAGE 4 - 1x Inline Carbon Post Filter 2" x 10" - Replace Every 12-24 Months
5 STAGE systems use an extra Activated Carbon and/or remineralizing cartridge.
* Frequency of Filter replacement depends on the quality of your water and consumption habits. It is recommended to test your water every 6-12 months to ensure your RO system purifies your water adequately to keep contaminants below 50 ppm (parts per million - milligrams over liters). Please use the TDS that came in your box to check TDS levels.