Abstract: A tank assembly suitable for use in the transport of liquids, the tank assembly including at least two tank sections which are adapted to be fitted together in an assembled position. Each tank section includes an end wall, the end walls being adjacent one another when the tank sections are in the assembled position. The end walls have cooperating formations thereon which are adapted to cooperate with one another so as to limit relative movement between the tank sections at least in one direction when in the assembled position.