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 Special pieces; sanitary Oil and grease trap register box Cistern and well detail Bathroom detail with technical specifications of materials and finishes Hydraulic and drainage details Piping Connection Details bathroom counter Pool with a laundry cistern tank water heater Inspection mouth and camera spout detail Isometric of sanitary facilities Sanitary sewer facilities school rooftop parabolic funnel Manual of tube systems for construction Sanitary sewerage detail Sanitary Grease Trap Tank bathroom nucleus bathroom remodeling