PUREPLUS 5 Micron 10" x 4.5" Whole House CTO Coconut Shell Activated Carbon Water Filter Replacement Cartridge for Dupont WFHDC8001, CB-BB-10, GE FXHTC, GXWH40L, GXWH35F, GNWH38S, CTO10BB, 2PACKTested and certified by IAMPO to NSF ANSI 42 standards for material safety and achieving a 99% reduction of Chlorine, sand, rust, sediment, and color. This filter also meets European EC 1935 2004 food grade regulations, the Australian Water Mark, and BPA free certifications. This kind of filter is recommended for tap water filtration. If your water source is well water, this filter may not achieve the filtering effect you expect. Check out our other