Abstract: The modular conduit unit formed from at least four conduits secured together in spaced relationship by means of a plurality of spaced star-shaped spacer elements. The star-shaped spacer elements are each formed with four equally spaced hollow projections that terminate in end walls and have curved side walls. The curved side walls of adjacent projections merge to form outer walls of the element that are in the form of cylindrical segments. An integral reinforcing member interconnects said outer walls at points spaced from said end walls and a line of weakness is found in each of said end walls and extends substantially longitudinally of the cylindrical segments. The line of weakness facilitates breaking of the star-shaped member for replacement of a conduit.