Downspout ventilation 2D AutoCAD drawing is given in this file. Wall, finished floor, reducer ø110mm to 50mm, pvc pipe. Ø110mm, beam, elbow 45º ø110mm, yee ø110mm, pvc grid Ø50mm, and other details are mentioned. Water line section drawing is given. For more details download the AutoCAD DWG drawing file from our cadbull website.