Waterway 8" Anti Vortex Vinyl Main Drain [Round] [2" Socket] [Grey] (640 2757 V) haywardpool This replacement is especially useful This replacement is especially useful where one side of the system needs to thread directly into an existing fitting or housing while the other side remains slip plumbed Filter cartridge for compatible C 6900 spa and pool applications The Waterway 640 2757V anti vortex vinyl main drain is designed for compatible round drain applications with a 2 inch socket connection and a gray finish This vinyl style configuration is useful in pool and spa applications where the drain must match both the installation type and the surface appearance of the vessel