System for the transmission of liquids in a rotatable building

System (1) for transmitting liquids between a stationary core (2) and a rotatable story (3) of a building (4) in which said rotatable story (3) is arranged substantially circumferentially around said stationary core (2) and is rotatable with respect to said stationary core (2) about a vertical reference axis (5) that is the longitudinal axis of a section of the core (2) at which the story (3) is arranged,

• the system (1) comprising an annular buffer duct (6) extending circumferentially around the reference axis (5) of the stationary core (2) and having an annular lower duct portion (7) extending along the entire circumferential length of the buffer duct (6), and an upper duct portion (8) arranged from above in liquid communication with the lower duct portion (7) and slidingly engaging the lower duct portion (7) in at least one interface (9) extending along the entire circumferential length of the buffer duct (6),
• one of the lower duct portion (7) and upper duct portion (8) being fixed to the stationary core (2) and the other one of the lower duct portion (7) and upper duct portion (8) being fixed to the rotatable story (3), so that upon rotation of the story (3) with respect to the core (2) about the reference axis (5), the upper and lower duct portions (8, 7) rotate relative to each other about the reference axis (5),
• the buffer duct (6) internally defining at least one annular transmission chamber (10) into which the liquid enters from above through one or more inlet ports (11) formed by the upper duct portion (8), and from which the liquid exits through one or more outlet ports (12) formed by the lower duct portion (7),
• the transmission chamber (10) being at atmospheric pressure.