Long-lasting filter life : Each faucet filter provides 320 gallons (1211 litres) of clean water, or 3 months of typical use - that's 2x longer than most faucet filters. NSF certifications : Tested and certified by NSF International against NSF/ANSI standard 42 for the reduction of chlorine, taste and odor, and to NSF/ANSI 372 for material.
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