About this itemCompatible models: Filterlogic black water filter can replacement for Berkey BB9-2 water filter, Berkey Gravity Filter System including Travel, Big, Royal, Imperial, Crown Series. The precise design of washer and wing nut firmly connected to prevent leakage. Please flush filter for 1 min before use by connecting to faucet. Note: if faucet not fully compatible, splashing may occur but won’t affect product.High efficiency filtration: The black water filter, with the same strong purification capacity as the original filter this filter, can reduce up to 99% of chlorine. It also can reduce heavy metal, sediment, chlorine, sand, rust, odor and large particles in source water, improving the taste of water.Certification, safe Materials: The Filterlogic water filter has passed authoritative NSF/ANSI 42&372 certification. Our filters adopt high-quality natural coconut shell activated carbon. We strictly control filtration materials and produce them with lead-free, BPA-free materials to ensure excellent filtration performance and user safety. Please note that TDS level does not fully indicate the quality of the water and our filters DOES NOT lower TDS value.Economical choice: We recommend you replace the black filters every 6,000 gallons per pair, which can save 45,000 water bottles. It saves your effort and money on the frequent replacement.Multiple application: Suitable for in-house, travel and outdoor activities, as well as water shortage emergencies, whether at home or outdoors. The filter can provide you with healthy clean quality water. Please note the water filter is not sourced by or sponsored by Berkey. Filterlogic is an independent brand.Product DescriptionHigh-quality MaterialsEmploys coconut activated carbon block, granular activated carbon and activated alumina as the filter media to ensure excellent reduction performance and better taste.Tightly FittedReplacement for Black Berkey Elements BB9-2 Filters、Replacement for Travel, Big, Royal, Imperial and Crown Berkey Gravity-Fed Water Filter.Buy It, Profit ItWe recommend you replace the black filters every 6,000 gallons per pair and replace the fluoride filters every 1,000 gallons per pair, which will be different based on water conditions.