Drain for improved rainwater uencing a siphon sandbox well with its corresponding grid placed on top of the mouth of generally prismatic body constituting the sink itself, and presenting it in one of its major faces a hole for coupling the corresponding driving drain and an inner wall and facing parallel to the hole, inferiorly surpassing the level thereof to determine the siphon assembly, is characterized in that said coupling hole conducting drain is escorted by a certain external neck by two concentric walls or partitions, with a slight gap between them and separated by a line of weakness, it said walls being provided to fit said diameter standard pipes; being further provided in correspondence with the opening or top edge of the sump body is likely to be provided a tubular insert and open at both ends, determining an upper extension of the sump body to accommodate elevations ground level, counting said supplement in its lower edge with a doubly stepped support skirt and adaptation on a perimetric wing for such purpose in the mouth of the sump body while superiorly the supplement has a perimetric wing to support the corresponding support frame grid. (Machine-translation by Google Translate, not legally binding)
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