Description
Granular Activated Carbon (GAC) filter is a type of water filter that uses loose granules of activated carbon to remove contaminants from water. Specifically, the “20BB” refers to its dimensions, being a 20-inch long and 4.5-inch diameter “Big Blue” size filter. These filters are commonly used in whole-house systems to reduce chlorine taste and odor, as well as other organic compounds and sediments.




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