# In this title:
(1) ASME/ANSI.–The term “ASME/ANSI” as applied to a safety standard means such a standard that is accredited by the American National Standards Institute and published by the American Society of Mechanical Engineers.
(2) Barrier.–The term “barrier” includes a natural or constructed topographical feature that prevents unpermitted access by children to a swimming pool, and, with respect to a hot tub, a lockable cover.
(3) Commission.–The term “Commission” means the Consumer Product Safety Commission.
(4) Main Drain.–The term “main drain” means a submerged suction outlet typically located at the bottom of a pool or spa to conduct water to a recirculating pump.
(5) Safety Vacuum Release System.–The term “safety vacuum release system” means a vacuum release system capable of providing vacuum release at a suction outlet caused by a high vacuum occurrence due to a suction outlet flow blockage.
(6) Swimming Pool; Spa.–The term “swimming pool” or “spa” means any outdoor or indoor structure intended for swimming or recreational bathing, including in-ground and aboveground structures, and includes hot tubs, spas, portable spas, and non-portable wading pools.
(7) Unblockable Drain.–The term “unblockable drain” means a drain of any size and shape that a human body cannot sufficiently block to create a suction entrapment hazard.