Which statement about rough-in inspection is correct?

Which statement about rough-in inspection is correct?

• A. Rough-in inspection is optional
• B. Rough-in inspection is performed after fixtures are installed
• C. Rough-in inspection shall be made when the system is rough-in and before fixtures are set
• D. Rough-in inspection is performed at final inspection

Answer: (C)

Rough-in inspections happen when the piping is in place but before any fixtures are installed. This timing lets the inspector verify the layout, slopes, venting, trap placements, and required clearances while everything is still accessible, so adjustments can be made without breaking finished walls or floors. That’s why the statement that it shall be made when the system is rough-in and before fixtures are set is the correct one. Rough-in isn’t optional, it isn’t done after fixtures are installed, and it isn’t the final inspection—it's the check that occurs during the early stage to ensure the plumbing work meets code before completion.

Rough-in inspections happen when the piping is in place but before any fixtures are installed. This timing lets the inspector verify the layout, slopes, venting, trap placements, and required clearances while everything is still accessible, so adjustments can be made without breaking finished walls or floors. That’s why the statement that it shall be made when the system is rough-in and before fixtures are set is the correct one. Rough-in isn’t optional, it isn’t done after fixtures are installed, and it isn’t the final inspection—it's the check that occurs during the early stage to ensure the plumbing work meets code before completion.