APEC FILTER-MAX45 50 GPD Complete Replacement Filter Set for ULTIMATE Series Reverse Osmosis Filter System

1st stage: high-grade 10 inch high-capacity polypropylene sediment filter -removes dust; particles; and rust. 100% pure polypropylene depth filter with exceptional dirt-holding capacity translates to longer life and fewer change-outs than existing string-wound or resin-bonded filters. Recommend changing every 1 year. 2nd and 3rd stage: premium extruded carbon block 10 inch -gets rid of unpleasant chlorine; tastes; odors; cloudiness and colors. Also removes VOCs and other common chemicals from the . APEC's extruded carbon block filters consist of activated carbon particles fused into a uniform block with enhanced adsorptive capacity and efficiency. Unlike granular activated carbon (GAC) filters; these extruded carbon block cartridges will not channel or bypass due to the extreme uniformity of their extruded activated carbon core. Recommend changing every 1 year. 4th 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 3-5 years. 5th stage: advanced coconut shell refining carbon 10 inch - TCR (TOTAL contamination removal) filter removes any possible residual taste from the tank. Recommend changing every 3-5 years. For over 20 years; APEC has been an industry leading manufacturer of high performance RO systems.