ASSEMBLY: A Drain Box consists of a top cover, a bottom plate, and as many sidewall panels as needed to obtain the required height. Each sidewall panel consists of four 4” elements molded together and can be snapped apart to yield one, two, or three elements. Sidewall elements can be stacked provided joints on adjacent sides are staggered. Assemblies taller than 16” should be screwed together through the holes provided at each corner.