Which abbreviation stands for drain, waste, and vent?

The abbreviation that stands for drain, waste, and vent is DWV. This terminology is commonly used in plumbing to describe a system integral to removing wastewater and sewage from buildings while also ensuring proper air circulation to prevent vacuum formation in the pipes. The "D" represents the drain, which collects wastewater from sinks, showers, and appliances. The "W" signifies waste, which refers to the solid and liquid byproducts from toilets and other fixtures. The "V" stands for vent, which is crucial for allowing air to enter the plumbing system to maintain pressure balance and prevent the formation of vacuum, ensuring smooth drainage.

Understanding this abbreviation is fundamental for anyone involved in plumbing design, installation, or inspection, as it encapsulates a critical aspect of plumbing system functionality and code compliance.