Plumber Red Seal · Question
What defines the end of a circuit-vented branch and determines the required location of the circuit vent connection?
A circuit vent is taken off the horizontal branch downstream of the last fixture drain connection and upstream of the next downstream soil or waste stack. This
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Question: What defines the end of a circuit-vented branch and determines the required location of the circuit vent connection?
Answer options:
- The vent stack on the downstream end of the branch.
- The connection between the most upstream fixture and the horizontal branch. ✅ The connection between the most downstream fixture drain and the horizontal branch.
- The point where the horizontal branch connects to the soil or waste stack.
Correct answer: The connection between the most downstream fixture drain and the horizontal branch.
Explanation: A circuit vent is taken off the horizontal branch downstream of the last fixture drain connection and upstream of the next downstream soil or waste stack. This ensures all fixtures on the branch are vented.
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