Easy installation & Perfect design: Leak-Free experience. No-tools required base on Push and Twist easy Installation Design. NSF Certified: Certified by NSF against NSF/ANSI 42 standards ensuring high-quality drinking water. Great Filtration: Designed to provide superior filtration, removing impurities such as chlorine, sediment from your water, giving you and your family clean and fresh-tasting water. Long-lasting: With a long lifespan, ensures continuous clean and safe drinking water for an extended period of time. Compatibility: ULTRAWF, Pure Source Ultra, Kenmore, 46-9919, 46-9999, 469999, 9919, 9999.