Pack of 4 BERKEY BB9-2 replacement filter cartridges, with activated carbon filter, suitable for gravity water distribution systems.

4-Pack Berkey BB9-2 Black Activated Carbon Filter Cartridge Water Filter, Suitable for Gravity Filtration Systems P20250110581 [Filtration Accuracy up to 1 Micron]: For superior filtration performance, this cartridge uses high-quality activated carbon derived from coconut shells as the filter media, achieving a filtration accuracy of up to 1 micron. It effectively removes impurities such as sand, rust, sediment, and odors, while also absorbing residual chlorine with a removal rate of over 99%. [Compatible Models]: This cartridge can replace existing cartridges. It is compatible with Travel, Grand, Royal, Imperial, and Crown series gravity filtration systems. The precisely engineered gasket and wing nut ensure a secure connection and prevent leaks. No pre-rinsing is required; the cartridge can be used immediately after replacement. There are no problems with insufficient water flow. [Long Life]: To extend the life of your device and ensure optimal performance, we recommend replacing the filter cartridge every 6,000 gallons of filtered water (the exact amount depends on the quality of your tap water). Please note that you must fully immerse the activated carbon filter cartridge in water once a week for your drip irrigation system to function properly. [Note]: Please immerse the filter cartridge in water before installation and clean it thoroughly to remove any manufacturing residue. Color: Black. Material: Activated carbon from coconut shells. Package Contents: 4 x Water Filter Cartridges. This package contains only the contents and no other products. Note: Due to light reflections and different monitor settings, the color of the item in the image may differ slightly from the actual product. Measurement error: +/- 1-3 cm.