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1st Stage 1 Micron Polypropylene Sediment Filter, 2.5" x 9 7/8" To remove larger particles suspended matter such as dirt, silt, rust, sand, algae, sediment, scale particles, dirt and cloudiness from water. Replace every 6~9 months 2nd Stage Carbon Filter, 2.5" x 9 7/8" Gives your water sweet taste remove chlorine, pesticides, herbicides, bad taste odours. Replace every 6~9 months 3rd Stage Carbon Block Filter, 2.5" x 9 7/8" To remove small particles and carbon fines may pass from second stage to ensure chlorine and odor removal. Replace every 6~9 months 4th Stage 75 GPD (75 Gallon per Day) Reverse Osmosis Membrane. Removes and filters particles as small as 1/10,000 of a micron and most inorganic chemicals (such as salts, metals, minerals). Also most microorganisms including cryptosporidium and giardia, and many other inorganic contaminants. Replace every 12~18 months 5th Stage T33 Filter, 2" x 10" Polishes and refines for a sweeter tasting water. Removes any tastes or odors the water may have picked up while sitting in the storage tank. Replace every 12~24 months.

5 Stage Reverse Osmosis RO Water Filters Replacement Set with 75 GPD Membrane (white) - B0722XQXK2