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The AP811-2 by 3M Aqua-Pure water filter replacement cartridge reduces dirt and rust up to 25 microns. This 3M Aqua-Pure larger diameter dirt and rust cartridge is for larger homes and commercial applications. The 3M Aqua-Pure AP811-2 dirt & rust water filter cartridge is made from an exclusive process using pure white cellulose fibers. As water passes from the outer surfaces into the center of the cartridge, the filtering pores become increasingly smaller to remove even microscopic particles. Unlike string-wound and pleated paper cartridges, the rigid, sturdy construction of the 3M Aqua-Pure cartridges are able to withstand high pressure drop and stressful conditions such as water hammer.
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