I got such a fine suggestion last time that I thought of another one. Suppose I have a 4" underground pvc conduit with 2 - 1" innerduct pvc conduits. When the conduit surfaces vertically at ground level and the 1"ers continue on their way, up the side of a building for example. Does anyone have suggestions on how to plug the 4". Are there split caps with cut-outs or some foams that could accomplish this?