AP4K - Replacement Filter Kit for 4 Stage Reverse Osmosis

The AP4K Replacement Filter Kit from AMPAC USA maintains the purity of your drinking water by replacing the critical filtration components in AMPAC USA and other standard 4-stage reverse osmosis systems. Regular replacement prevents contaminant buildup, maintains optimal performance, and extends the unit's lifespan, ensuring a continuous supply of fresh, filtered water.

• 5-micron sediment pre-filter, captures rust, sand, and dirt
• CTO/2 extruded carbon block 5-micron pre-filter, reduces chlorine, chloramines, and organic chemicals
• Inline GAC granular activated coconut shell carbon post-filter, final polish for taste and odor
• Compatible with AMPAC USA and other standard 4-stage RO systems

The kit includes three filters, each playing a role in the multi-stage process. The 5-micron sediment pre-filter captures larger particles such as rust, sand, and dirt, protecting the subsequent filters from premature clogging. The CTO/2 extruded carbon block 5-micron pre-filter follows, reducing chlorine, chloramines, and other organic chemicals that affect taste and odor, with a dense carbon block design that maximizes contact time.

The inline GAC granular activated coconut shell carbon post-filter is positioned after the reverse osmosis membrane (not included in this kit but core to a 4-stage system) and acts as a final polish, removing residual impurities that may have bypassed earlier stages so the water is clean, refreshing, and free of lingering aftertaste.

Each filter in the AP4K is produced to strict quality control standards for reliability and consistent performance. Regular maintenance with the AP4K is simple and cost-effective, providing all the necessary pre- and post-filters for a 4-stage system, whether it is an AMPAC USA unit or another standard 4-stage system, protecting the RO membrane and extending the life of the whole system.