• 【New Upgrade】Following a significant upgrade, the product’s model number has been updated from AQU-3US-AF01 to AQU-WF01.
  
• 【Compatible Models】This filter is 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 many product model numbers are very similar. Be sure to double-check the exact model number to ensure you purchase the correct filter!
  
• 【NSF/ANSI Certified Performance】It holds NSF/ANSI 42 certification. With high-efficiency filtration, it is committed to delivering an exceptional water experience.
  
• 【Authority-Guaranteed Materials】The specially chosen premium materials have been certified by IAPMO to meet the NSF/ANSI 372 standard, ensuring a satisfying and safe user experience.
  
• 【Stable Flow Rate】It provides a steady supply of filtered water without any noticeable pressure drop. Its efficient filtration ensures the best possible drinking experience.
• 【Long-Lasting Service Life】To enjoy fresh water, replace the filter every 6 months or after 6,000 gallons of use—whichever comes first. The replacement frequency may vary depending on water quality. Important: This filter must only be connected to the cold water valve! Additionally, note that this filter does not reduce TDS (Total Dissolved Solids).