Certified filtration: The water filter is NSF 42 certified for the reduction of chlorine, taste and odor. It is also NSF 372 certified for lead-free material. New version: This WD-PF-01A Plus filter matches with All Pitcher Filtration Systems, including models WD-PT-05, WD-PT-05-L, WD-PT-07, WD-PT-04, WD-PT-72, WD-PT-61.