AQUACREST Replacement 3US-AF01 Under Sink Water Filter, Compatible with Standard Filtrete 3US-AF01, 3US-AS01, Whirlpool WHCF-SRC, WHCF-SUFC, WHCF-SUF Water Filter (Pack of 2) Our high-quality filters offer clean and fresh water to you and your family. Its easy to install requiring no tools. For detailed instruction, please kindly refer to the Instruction Manual in the box. **Please note that the compatible model numbers of the Filtrete products are quite similar. Double check the exact model number before purchase to make sure you get the right one! To enjoy fresh water, it is recommended you replace the filter every 6 months or 2,000 gallons, whichever comes first will vary based on water quality. Offer reasonable price without compromising quality. Interchangeable with the 3M Filtrete 3US-AF01 Filter Cartridge; Fits W/ 3M Filtrete 3US-AF01, 3US-AS01, Whirlpool WHCF-SRC, WHCF-SUFC, WHCF-SUF, 4306791, 4306809, 4306817, 4306825 . AquaCrest is an independent brand. This filter is not an original product.