Flexible tank

A flexible tank fillable with a liquid comprising:

• a base having an upper surface and a lower surface, the base comprising a rectangle defining four of edges and a perimeter;
• an enclosing wall extending from each of the four edges and terminating at a distal end, wherein adjacent ones of the enclosing walls are attached to each other, to, together with the base define an enclosure;
• an inner brace assembly comprising at least one inner support member having a base wall attachment side and an encasing wall attachment side, wherein the base wall attachment side is attached to the base spaced apart from the perimeter and wherein the encasing wall attachment side is attached to at least one enclosing wall spaced apart from the base fold;
• an opening assembly comprising a chute having a proximal end attached to an enclosing wall and a distal end spaced apart therefrom to define an elongated channel providing access to the enclosure;
• a pair of inlet openings, each of the pair of inlet openings extending through an enclosing wall on opposite sides of the base, the pair of inlet openings spaced apart from the edge of the base;
• and
• an upper access opening extending through an enclosing wall, the upper access opening being positioned closer to the distal end of a respective one of the enclosing walls than to the base fold thereof.

A method of filling a flexible tank, the method comprising:

• positioning a flexible tank on an outside surface, the flexible tank comprising:
• a base having an upper surface and a lower surface, the base defining a plurality of edges and a perimeter;
• at least one enclosing wall extending about the base and attached thereto to, together with the base define an enclosure;
• an inner brace assembly comprising at least one inner support member having a base wall attachment side and an encasing wall attachment side, wherein the base wall attachment side is attached to the base spaced apart from the perimeter and wherein the encasing wall attachment side is attached to the at least one enclosing wall spaced apart from the base fold;
• and
• an inlet opening extending through the at least one enclosing wall and providing access to the enclosure.
• filling the flexible tank through the inlet opening with a liquid;
• during the filling of the flexible tank, placing at least one inner support member into tension;
• during the filling of the flexible tank, increasing tension on the least one inner support member to a maximum tension;
• during filling of the flexible tank, after increasing tension on the at least one inner member, reducing the tension on the at least one inner support member below the maximum;
• completing the filling to a desired level, wherein the step of reducing the tension occurs prior to or at the time of completing the step of filling.