Plumber Red Seal · Question
What is indicated by a persistent bubbling noise coming from a fixture trap?
Persistent bubbling in a trap often indicates that the vent pipe is either blocked or improperly installed, or that an AAV is stuck open/closed. This prevents p
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Question: What is indicated by a persistent bubbling noise coming from a fixture trap?
Answer options:
- High water pressure ✅ A blocked vent pipe or faulty air admittance valve
- Minor pipe leak
- Excessive drain slope
Correct answer: A blocked vent pipe or faulty air admittance valve
Explanation: Persistent bubbling in a trap often indicates that the vent pipe is either blocked or improperly installed, or that an AAV is stuck open/closed. This prevents proper air equalization and can lead to trap seal loss.
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