AP3K - Replacement Filter Kit for 3 Stage Reverse Osmosis

The AP3K is a complete replacement filter kit for AMPAC USA 3-stage under-counter reverse osmosis systems and compatible 3-stage RO filter systems using standard 10-inch filter housings. The kit provides everything needed for a full annual filter service in one convenient package.

Kit includes:

• CTO/2 Extruded Carbon Block Pre-Filter — 5 micron rating for combined sediment filtration and chlorine, taste, and odor reduction
• GAC Granular Activated Coconut Shell Carbon Post-Filter — polishes final permeate water for improved taste before the faucet

The carbon block pre-filter protects the RO membrane from chlorine oxidation and particulate fouling. The coconut shell GAC post-filter provides superior taste improvement compared to bituminous carbon, removing residual tastes and odors from stored permeate water. Replacing all filter stages simultaneously at the annual service interval ensures complete system refresh and prevents the common mistake of leaving exhausted media in place.

Compatible with all standard 10-inch filter housings. Replace annually or every 6 months for high-usage applications. For 4-stage and 5-stage system kits, see the AP4K and AP5K replacement filter kits.