10.22. The water recirculation system of a swimming pool must be designed to avoid trapping any swimmer who comes into contact with a drain or suction outlet. The system must be equipped, for each pump, with(a) at least 2 drain or suction outlets at least 1 m apart;
(b) a device to limit the water flow through the openings in each outlet to the maximum prescribed by the drain cover manufacturer;
(c) an emergency shut-off easily accessible to swimmers at a clearly indicated location; and
(d) drain or suction outlets covered by drain covers that comply with the standard “Suction Fittings for Use in Swimming Pools, Wading Pools, Spas, Hot Tubs, and Whirlpool Bathtub Appliances”, ASME 112.19.8 M, and designed so that bathers cannot remove them without tools.