1 Year Replacement Set for 5 Stage RO System - 50/75/100 GPD TFC Membrane

• Stage 2 - Granular Activated Carbon (GAC) removes chlorine, hundreds of contaminants/chemicals, and unpleasant taste and odor from water, and reduces hydrogen sulfide (rotten egg smell) and PFAS (PFOA, PFOS). (Replace every 6-8 months) - 2 Pieces

• Stage 3 - 5 Micron NSF Activated Carbon Block - High purity coconut shell activated carbon block filter reduces sediments, taste, odor, color, SOCs (soluble organic compounds) and VOCs (volatile organic compounds), and chlorine and its byproducts such as THM and TCE.. (Replace every 6-8 months)  - 2 Pieces

• Stage 4 - High quality NSF Reverse Osmosis Membrane: Removes 99% contaminants present in water.  (Replace every 2 years) - 1 Piece (optional)

• Stage 5 - In-line Post Carbon NSF GAC filter removes dissolved gases, bad taste and odor from product water. This is the final polishing stage before consumption. (Replace every 1 year) - 1 Piece

Age of the filters depends on GPD consumed and quality of feed water.