Stackable storage tank

A container assembly for storing fluid, comprising:

• a hollow container having a top, an intermediate portion and a bottom;
• a pallet base having an upper container supporting surface and a lower surface;
• means for removably securing the hollow container to the pallet base;
• sealable drain means for communicating the interior of the container with the exterior thereof, said drain means being positioned on the bottom of the container substantially along a longitudinal axis of said container;
• discharge valve means and at least one discharge hose connecting the sealable drain means to the discharge valve means, the discharge valve means enabling the fluid stored in the container to be drained at a predetermined rate;
• and
• a bracket for securing the discharge valve means to the pallet base;
• the top of the container having upwardly extending projection means extending outward from an outer surface of the top in a direction substantially parallel to the longitudinal axis of the container;
• the securing means comprising cable means for passing over the top of the container between the upwardly extending projection means and joining to the pallet base to secure the container to the pallet base to form the container assembly;
• the bottom of the container having an inner and outer surface, the inner surface of the bottom of the container being formed to direct, in the operative position of the container, the fluid within the container toward the sealable drain means;
• the outer surface of the bottom of the container and the upper container supporting surface of the pallet base being configured to cooperatively interengage with each other to restrict relative lateral movement between the container and the pallet base and comprising aligning means for aligning the container at a designated rotational position with respect to the pallet base;
• the lower surface of the pallet base having at least one recess means for receiving said projection means on the top of a like container so that the container assembly can be stacked upon a like container assembly and relative lateral movement will be restricted therebetween;
• the bracket being configured to cooperatively engage with said projection means on top of said like container to facilitate stacking and to further restrict relative lateral movement therebetween.