Plumber Red Seal · Question
When installing a wet vent, what primarily determines the minimum required size of the wet-vented portion?
The size of a wet vent is determined by the total hydraulic load (fixture units) of all fixtures it serves, as it must handle both drainage and air circulation.
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Question: When installing a wet vent, what primarily determines the minimum required size of the wet-vented portion?
Answer options:
- The total number of fixtures connected.
- The fixture unit load of the water closets connected to it. ✅ The fixture unit load of all fixtures connected to it.
- The length of the longest trap arm.
Correct answer: The fixture unit load of all fixtures connected to it.
Explanation: The size of a wet vent is determined by the total hydraulic load (fixture units) of all fixtures it serves, as it must handle both drainage and air circulation.
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