Waterway Tank Bottom For Crystal Water Cartridge Filters | 550-4400 | 550-4407The Waterway Tank Bottom 550 4407, serves as a replacement component for Crystal Water Cartridge Filters. This filter body bottom ensures a secure fit and optimal performance, maintaining the integrity of your pool's filtration system. Constructed from durable materials, it withstands high pressure conditions and exposure to pool chemicals. The design is compatible with both new and old style filter heads, facilitating easy installation without the