Paramount SDX2 10" Round High Flow Suction Outlets - 2 Pack SDX2 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 VGB compliant. SDX2 Retro fits existing plaster rings up to 10″ in diameter. SDX2 boasts a flow rating of 188 gpm on the floor and 154 gpm on the wall making it compatible with most residential pumps up to 3 hp. SDX2 has a 1.396 feet per second velocity at the opening at a maximum listed 188 gpm. The SDX2 Sumpless suction/main drain outlets can be used on the pool floors or walls and are designed to installed during new construction or remodels when a new plaster ring is being installed (such as when a new interior finish is being applied).SDX2 Suction Outlets Feature: 10" Round main drains for concrete pools Includes 2 complete main drain suction outlets Anti-vortex shield blocks contact from direct suction Ribbed design acts as 60 "mini" drains Secondary support plate protects the sump and fittings Made from UV-resistant engineered polymer No sump required Stainless steel security screws SDX retro can be installed as a single cover with an SVRS installed on the suction line ASME A112.19.8 2007 Listed Compliant with the Virginia Graeme-Baker Pool and Spa Safety Act USPC (uniform swimming pool, spa and hot tub code) compliant Replace every five years from the date of purchase Dual - Sumpless Specifications: Floor -188 gallons per minute Wall -154 gallons per minute