💦 Elevate Your Hydration Game! NSF International tested and certified for your safety and confidence. Compatible with all 20" Pentair Pentek Big Blue and other heavy-duty filter housings. Unique radial flow design minimizes pressure drop and carbon fines release. Experience crystal-clear, great-tasting water with reduced sediment and chlorine. Enjoy up to 100,000 gallons of purified water before needing a replacement. 100,000 GALLON CAPACITY NSF CERTIFIED LOW PRESSURE DROP The Pentair Pentek RFC-20BB Big Blue Carbon Water Filter is a heavy-duty, 20-inch replacement cartridge designed to enhance your home's water quality. With a capacity of 100,000 gallons and NSF certification, it effectively reduces sediment and chlorine taste, ensuring you enjoy clear, great-tasting water. Its unique radial flow design minimizes pressure drop, making it a reliable choice for any 20" filter housing.