Hayward 1-1/2" Anti-Vortex Main Drain for Liner Pools (2 Pack) - #WG1048AVPAK2 FEATURES AND BENEFITS Hayward dual suction outlet with adjustable plaster collar It has a 1-1/2-inch side outlet design and works with concrete, vinyl, and fiberglass swimming pools VGB anti-entrapment complete main drain has 1-1/2-inch FIP bottom plug pipe size Complete set includes 2 sumps, 2 covers, ring, gaskets, screws Measures 7-7/8-inch diameter