the invention provides a self supporting isobaric structure for electrolyte aeration in an electrodeposition cell for electrolytic refining or winning of non - ferrous metals , and a method of fabrication thereof . the structure is constructed using thermoplastic material pipes the external surface of which is wrapped in a thermosetting polymer composite material and one or more successive wrapped layers of fiber glass mats , thus forming a structural monoblock . the pipes are arranged in a reticular layout having a generally rectangular frame that follows the contour of the cell , transverse structural elements that connect the longer sides of the frame and tubular elements connecting the shorter sides of the rectangular frame . the tubular element provide a means for gas diffusion and aeration in the cell . furthermore , the invention provides pipe couplings that allow shorter elements to be connected together in order to achieve the reticular configuration .