Home Building Facilities Sanitation Downpipe with parallel ventilation Downpipe with parallel ventilation Description Save Black water downspout in building ductwork; with parallel ventilation in pvc. Format DWG File size 54.02 KB DOWNLOAD DWG share your appreciation Related Posts Bomb chamber detail Bathroom Construction Section Capture with sanitary seal Details sanitary installation in building Sanitary stud detail Details in ss.hh. Elevated tank Details of a Bath battery Box 0.80 x 1.00 m Grease interceptor for kitchens Piping Connection Details Isometric detail of electric water heater Manholes and Sewer Lifting Stations Septic tank and sump 2 Level Room House Plans Architectural Details of a House Bathroom bmp well water type Kitchen development and sshh Public bathroom detail latrines