This architectural drawing is Horizontal vent pipe details in AutoCAD 2D drawing, CAD file, and dwg file. Each time a toilet is flushed or a sink is drained, fresh air is supplied through vent pipes to each plumbing fixture in the home, assisting the system in moving water through the drainage pipes. Plumbing air vents also enable the gas and odour of wastewater to escape while preventing sewer gases from entering the home. For more details and information download the drawing file. Thank you for visiting our website cadbull.com.