CompatibilitySuitable for faucets with 1/2' or 3/8' FEMALE NPT thread. If a female threaded connector is needed to connect to your faucet, please contact us BEFORE purchase. Ultra-Long Service Life: When used with municipal water, each under sink water filter has a maximum service life of 36 months or 24,000 gallons. Efficient Filtration: The Waterdrop Direct Connect Under Sink Water Filter System is tested by IAPMO against NSF/ANSI 42 for reduction of chlorine, taste & odor. Tested by KC authorative organization, it can effectively reduce VOC(chloroform), benzene, chlorobenzene, chloropicrin and styrene. It can effectively remove sediment, rust and other large particles. Tested by third party laboratory against NSF/ANSI 53 standard it can reduce lead.Besides, it can reduce PFAS, PFOA/PFOS. Solve Clogging Problem: By upgrading the filtration area, our filter now provides a 20X increase in dirt adhesion area, enhancing filtration capability while minimizing the risk of clogging.