[NSF/ANSI Certified]Pureza MWF water filter is tested and certified to NSF/ANSI 42 for chlorine reduction. This filter is tested and certified to NSF/ANSI 372 for lead free compliance. [Do better drinking water] Use Organic Carbon Block Triple Filtration Technology to make you satisfied with the drinking water by reducing all kinds of sediment, such as chlorine taste, odor, dirt, rust, turbidity, heavy metals and harmful sediments. [Why Choose Us] Our Products are Backed by a Life Time Guarantee and We Pride Ourselves on 100% Customer Satisfaction. To reduce your skepticism about Our quality.