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What is the Dual Vent (Unit Vent/Common Vent)?

1) A ventilation system with two separate vents
2) A ventilation system with a single vent
3) A ventilation system with multiple vents
4) A ventilation system with a common vent

1 Answer

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Final answer:

A Dual Vent or Unit Vent/Common Vent is a single-vent plumbing system allowing multiple fixtures to connect to one vent stack, saving space and materials while preventing sewer gas release.

Step-by-step explanation:

The term Dual Vent or Unit Vent/Common Vent typically refers to a type of ventilation system used in plumbing. It is actually option 2: A ventilation system with a single vent. This system allows fixtures that are close to each other to be connected to the same vent stack. The purpose of a dual vent is to help prevent water seals in the plumbing traps from being siphoned off, which can lead to the release of sewer gases into the building. It's essentially a way to save space and materials while ensuring that the system functions correctly and adheres to building codes.

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