Pentair StarGuard® 500100 Main Drain Cover with Long Ring (Single) Black 8" 1 Pack - New StarGuard® main drains comply with provisions of the ANSI per ASME A112.19.8-2007 standard and the Virginia Graeme Baker Pool and Spa Safety Act. High quality StarGuard® main drains are available in white, black, gray, and dark gray as well as a variety of configurations to fit any residential inground pool or spa installation. Review the specifications to find the right StarGuard® model for your application. StarGuard® main drains have an industry leading 15.35 sq-in of open area for water flow. If you are in an area where water velocity through the grate is limited to 1.5 ft per sec, the StarGuard covers allow flow rates up to 72 gpm.