Plumber Red Seal · Question
A plumber has completed the rough-in plumbing for a new commercial kitchen. Which inspection is typically requested before closing the walls and ceilings?
Before walls and ceilings are closed, a Drainage, Waste, and Vent (DWV) test and inspection (often a 'rough-in inspection') is typically performed. This inspect
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Question: A plumber has completed the rough-in plumbing for a new commercial kitchen. Which inspection is typically requested before closing the walls and ceilings?
Answer options:
- Final plumbing inspection ✅ Drainage, waste, and vent (DWV) test and inspection
- Water service connection inspection
- Backflow prevention device inspection
Correct answer: Drainage, waste, and vent (DWV) test and inspection
Explanation: Before walls and ceilings are closed, a Drainage, Waste, and Vent (DWV) test and inspection (often a 'rough-in inspection') is typically performed. This inspection verifies that all installed lines are correctly sloped, sized, connected, and pass a pressure test (air or water) to ensure they are leak-free and code-compliant before they become inaccessible. The final inspection occurs after fixtures are installed.
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