Specification Brand : Rocean BulletPoint1 : Enjoy long lasting, effective, and sustainable filtration BulletPoint2 : Each filter is good for up to 390 gallons of cleaner water BulletPoint3 : Thoughtfully made from plant-based coconut-shell carbon BulletPoint4 : Hydrate responsibly - say goodbye to single use plastic water bottles for good BulletPoint5 : Intelligent filter alerts you when it needs to be replaced based on actual usage, not time elapsed Capacity : 390 gallons CareInstructions : Hand Wash Color : White ExternallyAssignedProductIdentifier1 : 051678990018 ExternallyAssignedProductIdentifier2 : 0051678990018 ExternalTestingCertification : NSF/ANSI 42&372 Certification ExternalTestingCertification1 : ANSI ExternalTestingCertification2 : NSF GpsrSafetyAttestation : 1 IncludedComponents : replacement water filter ItemName : Pentair Rocean Reservoir Replacement Filter Cartridge for Rocean Countertop Tap Water Filter System ItemPackageDimensions_Height : 21.4122 centimeters ItemPackageDimensions_Length : 11.2014 centimeters ItemPackageDimensions_Width : 11.7094 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : replacement-kitchen-countertop-water-filters Manufacturer : Pentair Material : Carbon Block ModelName : OB03 ModelNumber : 4005801 NumberOfItems : 1 PackageLevel : unit PartNumber : 4005801 ProductBenefit : Provides long-lasting, effective, and sustainable water filtration, reducing single-use plastic bottle consumption ProductDescription : Specifications: (1)Compatible Models: Compitable with Berkey water filter systems and other similar gravity fed black carbon block filter systems (2)Product Dimensions: Φ2.25 x L 9.75 inches (3)Color: Black (4)Included Components: 2 x water filters Installation: 1. Extract the upper chamber from the system. 2. Open the lid and unscrew the oid water filter cartridges from the upper chamber. 3. Fill a clean container with clean water and soak the replacement water filter in the water for at least 30 minutes. Tilt the water filter, while under water, so that any air bubbles can escape from both ends. 4. Extract the replacement filter from the water. Cover the holes with either your fingers or the blue caps that came with the filter, and shake the filter vigorously. Then tap them lightly on the counter to loosen any residual manufacturing dust. 5. Screw the new water filter onto the upper chamber. 6. Return the upper chamber to the system by placing it onto the lower chamber. 7. Fill the upper chamber with water and let it drain into the lower chamber. When the lower chamber is full, discard the first batch of water as it may contain residual manufacturing dust. The system is now ready for use.