Plumber Red Seal · Question
A plumber has completed the above-ground rough-in of a new commercial building's drainage, waste, and vent (DWV) system. What type of inspection should be requested next by the plumber before concealing any of the work?
After the rough-in and before covering any pipes, a 'concealed plumbing inspection' (sometimes called a 'rough-in inspection') is required to ensure that the DW
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Question: A plumber has completed the above-ground rough-in of a new commercial building's drainage, waste, and vent (DWV) system. What type of inspection should be requested next by the plumber before concealing any of the work?
Answer options:
- A final plumbing inspection.
- A backflow prevention device inspection. ✅ A concealed plumbing inspection.
- A sewer connection inspection.
Correct answer: A concealed plumbing inspection.
Explanation: After the rough-in and before covering any pipes, a 'concealed plumbing inspection' (sometimes called a 'rough-in inspection') is required to ensure that the DWV system is installed correctly and to code. This inspection checks pipe sizing, slope, venting, and proper connection before the work is hidden.
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