Compatible models: The AQUACREST water filter can be replacement for Black Berkey Elements and Travel, Light, Big, Royal, Imperial, Crown Berkey series, and our AQUA CREST Gravity Water Filter System AQ-TN series.The water filter is not sourced by or sponsored by Berkey. AQUACREST is an independent brand. 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: Efficiently reduces up to 99% of chlorine, heavy metals, taste and odor, sediments, large particles . Clean water can be enjoyed outdoors at any time. Safe material: The filter uses natural coconut activated carbon, ensuring excellent reduction performance. Please note that TDS level does not fully indicate the quality of the water and our filters DOES NOT lower TDS value. Longer service life: To prolong the life of your appliance and achieve optimum performance, we recommend you replace the filter every 6,000 gallons per pair, which will vary based on water conditions. Perfect fit: Replacement for Black Replacement Filter and fit the water filter system working in pair with fluoride filter. Includes 1 priming button. An accurate design promises a perfect fit with the original brand without leakage. AQUACREST NSF/ANSI 42&372 Certified Water Filter