https://www.h2osplashwaterfilters.com/carb20by2-5q1.html
Carbon Block Filters (20" x 2 1/2")1
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https://watercompany.co.za/product-category/filter-cartridges/cto-carbon-block-filters/
CTO Carbon Block Filters Archives - The Water Company
CTO Carbon Block Filters, are made with coconut shell based carbon which creates what many believed to be sweeter tasting water.
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https://www.anchorfilters.com/products/anchor-carbon-block-replacement-filter-for-whole-house-water-filtration-systems
Carbon Block CTO Whole House Filter Cartridge | Anchor Water Filters
Carbon Block CTO Cartridge is a 20x 4.5 inches replacement cartridge for Whole House Systems made from high purity coconut shell activated carbon.
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