Whirlpool bathtub

A whirlpool bathtub (1), of the type comprising a>plurality of units (2) for generating flows of water and/or air inside the tub (1);

• each unit (2) comprising, attachable to a wall (1a) of the tub (1) with a through hole, at least:
• a chamber (3) for generating flows with at least one water passage/feed opening (4), an impeller (5) for generating flows and a nozzle (6), delimiting the chamber (3), designed to allow the directional outfeed of the flow towards the inside of the tub (1);
• drive means (7) for the impeller (5), connected to the impeller by a transmission shaft (8), and located outside the wall (1a);
• means (9) for supplying air to the chamber (3), connected to the chamber (3) and designed to allow the air to be mixed with the water which can be carried into the chamber (3), wherein each generating chamber (3) of the tub (1) consists of a casing (10) housing the impeller (5) and the transmission shaft (8), and wherein each of the drive means (7) consists of a rotor element (11) housed in the casing (10) and a stator element (12) which is located outside and which can be attached directly to the casing (10), having removable connecting means (13) for connection to the casing (10).