What is needed for the plumbing drain-waste-vent system
{"Image DocumentName": "What is needed for the plumbing drain-waste-vent system?", "Image ImageDescription": "Venting is vertical piping that is used to permit air to circulate into the piping resulting in a relatively constant air pressure throughout the system and allows the exhaust of sewer gas buildup above the roof.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}