Section 25(4) in Tamil Nadu Urban Local Bodies (Regulation and Monitoring of Swimming Pools) Rules, 2015
(4)Outlets. - Pools shall be provided with a main drain at the deepest point. The main drain shall be connected to the recirculation system. Openings must be covered by grating which cannot be removed without the use of tools. Openings of the grating shall be at least four times the area of the main drain pipe or have an open area. The maximum width of grate openings shall be 3.5 cm. Main drains and all other suction outlets installed in the pool shall be designed to prevent bather entrapment. Pool shall not be used if any of the covers are missing, unsecured or damaged.
