Local inspection: In municipalities with a local inspector, testing of the plumbing shall be done in the presence of a plumbing inspector.

• A. Testing is mandatory only for new construction.
• B. Testing shall be done in the presence of a plumbing inspector.
• C. Testing may be performed by the property owner without inspection.
• D. Testing is optional if the building is small.

Answer: (B)

Testing of the plumbing must be done in the presence of a plumbing inspector when there is a local inspector because having a qualified inspector witness the test guarantees it is performed correctly, using the proper procedures, and that the results are verified and documented. This oversight helps ensure the system is tested for leaks and proper operation under code requirements before components are concealed, protecting public health and ensuring code compliance.

The alternative ideas—that testing is only for new construction, that the property owner can test without inspection, or that testing is optional for small buildings—don’t align with this requirement, since the presence of the inspector is meant to provide verification and accountability during the test regardless of project type or size.