Plumber Red Seal · Question
According to the National Plumbing Code, what is the primary purpose of a circuit vent?
A circuit vent is a type of branch vent that serves two or more traps and extends from in front of the last fixture connection of a horizontal branch to the ven
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Question: According to the National Plumbing Code, what is the primary purpose of a circuit vent?
Answer options:
- To vent a single, isolated fixture
- To serve as a drain for an upper floor ✅ To provide ventilation for a battery of fixtures on a horizontal branch
- To prevent sewer gas from entering through floor drains
Correct answer: To provide ventilation for a battery of fixtures on a horizontal branch
Explanation: A circuit vent is a type of branch vent that serves two or more traps and extends from in front of the last fixture connection of a horizontal branch to the vent stack. It is an efficient method for venting a battery of fixtures, such as in a public washroom.
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