APEC FILTER-MAXCTOP-PH US MADE 90 GPD Complete Replacement Filter Set for ULTIMATE Series Countertop Alkaline Reverse Osmosis Water Filter System

APEC WATER SYSTEMS FILTER-MAXCTOP-PH high capacity filter set is made with high quality filtration components to provide a longer lasting filter set to protect and prolong the lifespan of your reverse osmosis system. 1st stage: high-capacity 10" inline polypropylene sediment depth filter will effectively remove dirt, sand and sediment from the water. Recommend changing every 6-8 months. 2nd stage: high capacity 10" inline coconut shell carbon filter to remove chlorine, tastes, odors, cloudiness and colors. Recommend changing every 6-8 months. 3rd stage: select FILMTEC (DOW chemical) high rejection TFC reverse osmosis membrane. Removes up to 99% of TOTAL dissolved solids (TDS) and contaminants such as arsenic, lead, fluoride, chromium, radium, bacteria, viruses and much more. Recommend changing every 2-3 years. 4th stage: high purity 10" inline calcium carbonate to effectively neutralize acidity. Recommend changing every 6-12 months.