Waterdrop10UA Under Sink Water Filter System, Reduces PFAS, PFOA/PFOS, Lead, Chlorine, Bad Taste and Odor, Under Counter Water Filter Direct Connect to Kitchen Faucet, NSF/ANSI 42 Certified, 8K gal. Extra RF10 Replacement Filter Cartridge for 10UA/10UB Under Sink Water Filter, Reduces PFAS, PFOA/PFOS, Lead, Chlorine, Bad Taste and Odor, NSF/ANSI 42 Certified, 11K Gal. High Capacity Compatibility: Suitable for faucets with 1/2 in. or 3/8 in. FEMALE NPT thread. If a female threaded connector is needed to connect to your faucet, please contact us BEFORE purchase. After Sales Assistance]: Waterdrop Backs the WD-10UA's high-end technical performance with a comprehensive prorated performance service should a quality issue arise with the filter, you can contact us. Deep Filtration and IAPMO Certified: Based on independent testing, this filter can efficiently reduces PFAS, PFOA/PFOS, large-particle contaminants such as rust, lead, chlorine, heavy metals, chemical impurities and sand through thorough purification for clean drinking water. The filter is made of high BPA-free and lead-free materials. It also can successfully reduce chlorine, taste and odor. This filter is certified by IAPMO against NSF/ANSI 372 Standard and NSF/ANSI 42 Standard. It can lower lead when tested by a third-party laboratory against NSF/ANSI 53 standards. Please use the in.WD-10UAin. search term to review the 42 and 372 certification on the IAPMO website.