SDX is a high flow suction outlet suitable for use as a wall fitting and also as a floor drain when debris removal is not a concern. A Retro version is available to bring existing suction outlet covers into compliance with the new law. SDX Retro fits existing plaster rings up to 10 in diameter. SDX boasts a flow rating of 200 gpm on the floor and 192 gpm on the wall making it compatible with most residential pumps up to 3 hp. SDX has a 1.485 feet per second velocity at the opening at a maximum listed 200 gpm.