If a control tank is divided into several chambers, the separating walls should be sufficiently rigid to ensure that the volume of a chamber does not vary by more than 0.2 % according to whether the adjacent chambers are full or empty.
Če je kontrolna posoda razdeljena v več komor, morajo predelne stene s primerno togostjo zagotoviti, da se prostornina komore ne spremeni za več kot 0,2 % glede na to, ali so sosednje komore polne ali prazne.