Alkalinity is a measure of the capacity of water to neutralize acids. Alkalinity is primarily due to the presence of bicarbonate, carbonate, and hydroxide ions. Alkalinity acts as a pH buffer to deactivate acidity. Water with high alkalinity may have an offensive taste. These filters are tanks filled with a media blend of calcium and magnesium carbonates made from naturally occurring minerals. This media slowly dissolves into the water, raising the pH and making it less corrosive. One of the most important benefits of alkaline water (besides increasing the pH) is that it lowers Oxidation Reduction Potential (ORP). Read more here and here . ITEM NUMBER SIZE FLOW RATE CAPACITY (<100 PPM HARDNESS) CQE-RC-04054 Sealed Cartridge .5 gpm (1.9 lpm) 12-18 months* CQE-RC-04058 2-7/8” x 9-3/4” .5 gpm (1.9 lpm) 12-18 months* CQE-RC-04091 2-7/8” x 20” 2.5 gpm (9.4 lpm) 12-18 months* CQE-RC-04092 4-5/8” x 9-3/4” 3 gpm (11.4 lpm) 12-18 months* CQE-RC-04093 4-5/8” x 20” 6 gpm (22.7 lpm) 12-18 months* Construction Materials Fiber Media Mixed Blend End Caps Polypropylene Post-Filter Spun Polypropylene Outer Casting Polypropylene Expansion Pad Polypropylene Gasket Buna-N (Top) Temperature Rating 40°F to 145°F (4.4°C to 62.8°C) *Capacity is an estimate only and is dependent on influent water contaminants and filter usage.
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