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KoolerMax Series replacement filter kit for models: K-5, K-6A, & AR-125
High capacity, replace every 12 month, Part no. KPAK-4
1st stage: high capacity, multi-layer 5 micron sediment filter, to remove sediment, rust, sand (replace every 6-12 months)
2nd stage: high capacity carbon filter, carbon block, coconut shell activated carbon removes chlorine, taste & odor (replace every 12 months)
* We have modified the filter from granular to carbon block for higher performance.
3rd stage: high capacity carbon filter, carbon block, coconut shell activated carbon further removing chlorine to ensure 100% removal of chlorine (replace every 12 months)
* We have modified the filter from granular to carbon block for higher performance.
5th or 6th stage:Inline carbon filter, granular activated carbon, coconut carbon, improves taste or water  (replace every 12 months)