Plumber Red Seal · Question
What is the primary function of a yoke vent in a multi-story building's DWV system?
A yoke vent is a pipe connecting a soil or waste stack to a vent stack. Its purpose is to relieve pressure fluctuations in tall stacks, preventing trap seals on
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Question: What is the primary function of a yoke vent in a multi-story building's DWV system?
Answer options:
- To provide a dry vent for a battery of fixtures ✅ To equalize pressure between a soil/waste stack and an adjacent vent stack
- To act as the main vent for the entire drainage system
- To vent an offset in a soil or waste stack
Correct answer: To equalize pressure between a soil/waste stack and an adjacent vent stack
Explanation: A yoke vent is a pipe connecting a soil or waste stack to a vent stack. Its purpose is to relieve pressure fluctuations in tall stacks, preventing trap seals on lower floors from being siphoned or blown out, particularly at intervals of about 5 stories.
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