Plumber Red Seal · Question
What is the primary purpose of a vent pipe in a plumbing drainage system?
The primary purpose of a vent pipe is to equalize air pressure within the drainage system, preventing the siphonage of trap seals and backpressure, which would
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Question: What is the primary purpose of a vent pipe in a plumbing drainage system?
Answer options:
- To allow for easy cleaning of the drainage pipes. ✅ To prevent backpressure and siphonage in traps.
- To provide a means for introducing chemicals into the system.
- To regulate the flow rate of wastewater.
Correct answer: To prevent backpressure and siphonage in traps.
Explanation: The primary purpose of a vent pipe is to equalize air pressure within the drainage system, preventing the siphonage of trap seals and backpressure, which would otherwise allow sewer gases to enter the building. Vents ensure proper drainage flow by allowing air to enter and exit the system.
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