Buried tank made of plastics material for holding rainwater has floor with drain in middle and corrugated edges engaging toothed lower edge of cylindrical side wall of tank

摘要

The top portion of the side wall (2) of the tank (3) is dome shaped and has thickened portions (9) provided with lifting lugs (12). The bottom part of the side wall is cylindrical, and its bottom edge has a toothed profile matching the stiffening corrugations (4) at the edge of the otherwise flat floor (1). The drain for removal of liquid from the tank may be connected to a suction line and is situated in the flat center of the floor.