Note: AQUACREST RF-9999 filter with stronger water flow meets the requirements of both high efficiency and rapid filtration. If turbidity appears in the filtered water at the beginning, please flush the filter for about 3 minutes to release bubbles before using. 【NSF certifications】Tested and certified by NSF International against NSF/ANSI standard 42 for the reduction of chlorine, taste and odor, and to NSF/ANSI 372 . For detailed NSF certification information: Visit the NSF official website, type "AQU-RF-9999" into "Brand name/ Trade name/ Model" bar and click the "Search" button. 【High-efficiency filtration】AQUACREST faucet water filter uses premium natural coconut activated carbon block with a reduction rate of chlorine up to 97.2%. It is also tested to reduce heavy metals, taste and odor, sediment, rust and so on. The efficient filtration is dedicated to provide you with an excellent water experience. 【 Various ways to use】It doesn’t matter if it’s for drinking, cooking, brewing coffee or making tea, you deserve refreshing and great-tasting water. Our faucet filter meets your water needs in various ways. 【 Long-lasting service life】 Enjoy fresh water by replacing your filter every 3 months. Whichever comes first will vary based on water quality. Please refer to the instructions for details. 【 Compatibility】Interchangeable with PUR RF-9999 faucet water filter; For use with PUR Classic, Advanced and Horizontal Faucet Mounts, including PFM100B, PFM450S, FM-3333, FM-9400B, FM-3700B, FM-3700, FM-2000B, FM-9000B, FM-4000B, FM-4100B, FM-2500V, FM-3400B, PFM350V, Pur-0A1, FM-9600, PFM150W, PFM400H, PFM-270G, PFM800HX, FM-9600 and more models. This filter is not sourced by or sponsored by PUR. The manufacturer’s name and part number have been used for reference purposes only.