Gas Fitter Practice · Question
What is the minimum vertical clearance required between a single-wall metal vent connector and combustible materials (e.g., wood studs)?
CSA B149.1 mandates specific clearances for vent connectors to prevent overheating of combustible materials. Single-wall connectors require a 9-inch (225 mm) se
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Question: What is the minimum vertical clearance required between a single-wall metal vent connector and combustible materials (e.g., wood studs)?
Answer options:
- 6 inches (150 mm) ✅ 9 inches (225 mm)
- 12 inches (300 mm)
- 18 inches (450 mm)
Correct answer: 9 inches (225 mm)
Explanation: CSA B149.1 mandates specific clearances for vent connectors to prevent overheating of combustible materials. Single-wall connectors require a 9-inch (225 mm) separation.
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- What is the maximum allowed pressure for a propane system supplying a residential appliance?
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