This is a Pentair replacement #2-137 2 Inch Bulkhead (Stand Pipe) O-Ring for FNS Plus D.E. Filters, Outlet Pipe, and Titan/Titan CM(O-24).
This o-ring also fits: Anthony 2 inch Plastic Slide Valve Connector, Hayward DEX2400Z5, Jacuzzi 14013909R, 47013909R, Pentair/American 510035, 59000600, Pentair/PacFab 192323, and Pentair/Purex P24305.
