• 【New Upgrade】After advanced upgrade, the model number is changed from AQU-3US-AF01 into AQU-WF01.
• 【Compatible with the Following Models】3M Filtrete 3US-AF01, 3US-AS01 system, Aqua-Pure AP Easy C-CS-FF, CS-FF system, WHCF-SRC, WHCF-SUFC, WHCF-SUF, 4306791, 4306809, 4306817, 4306825, OWS120-L, HC351-S, HC350-S, HC251-HS, HC255- HS. **Please note that the compatible model numbers of the products are quite similar. Double check the exact model number to make sure you get the right one!
• 【NSF/ANSI Certified Performance】NSF/ANSI 42 Certified. The high-efficiency filtration is dedicated to providing you with an excellent water experience.
• 【Authority Guaranteed Materials】Specially selected premium materials are certified by the IAPMO against NSF/ANSI 372 standard, which brings you a satisfying and safe experience.
• 【Stable Flow Rate】Provides you with stable filtered water without obvious pressure drops. The filtration is efficient enough to provide you with the best drinking experience.
• 【Long-lasting Service Life】Enjoy fresh water by replacing your filter every 6 months or 6,000 gallons. Whichever comes first will vary based on water quality. Connected with the cold water valve only! This filter does not reduce TDS！