Optimum Pool Technologies Filter Drain Plug Replacement for Hayward and Pentair 1.5" Threaded filter drain plug with O-Ring 1.5" Replacement drain plug for Hayward and Pentair filter tanks Replaces Part No: HAY-251-1503, SP1022C, AMP-061-1148, & 86202000 Also helps prevent damage to plumbing lines due to the expansion of freezing water Manufactured by Optimum Pool Technologies Replaces Part No: HAY-251-1503, SP1022C, AMP-061-1148, &amp; 86202000