Waterway Crystal Water Filter O-Ring 805-0000BWaterway Crystal Water Filter Main O Ring 805 0000B Maintain the efficiency and integrity of your pool filtration system with the Waterway Crystal Water Filter Main O Ring, part number 805 0000B. Designed specifically for use with both the Crystal Water Cartridge and D. E. Filters, this O Ring plays a critical role in ensuring a tight seal and preventing leaks within your filtration setup. Key Features: Essential Seal: This main O Ring provides a