In-floor swimming pool drain and sump assembly

A swimming pool drain and sump assembly with a toroidal drain housing that includes a lower section with a drain outlet port extending through the lower section wall and a continuous annular channel that loops back upon itself, and an upper section supported upon the sump base only along the inner wall, cantilevered over the sump base from a lower edge of the sump cover to an upper edge of the sump cover. The lower section and the upper section form an annular, continuous, uninterrupted, single orifice drain entrance channel between a top edge of the outer wall and the upper edge of the top piece. Some embodiments include a continuous, one-piece blockage tray insert adjustably positioned within the drain entrance channel and an access port cover within an access port that is a continuous opening with the drain entrance channel.