This Standard covers whirlpool and air-jetted bathtubs and suction fittings used in hydromassage bathtub systems that incorporate a bathtub and a circulation pump. The circulation pump can be with or without a piping system, and with induction of air by integral suction or air pump or without induction of air. This Standard specifies construction and general requirements, test methods, and markings for hydromassage bathtub systems.