No person shall use _____ or ______ materials in the working of plumbing

No person shall use _____ or ______ materials in the working of plumbing

• A. Safe or sound
• B. New or unused
• C. Unsafe or defective
• D. High-quality or good

Answer: (C)

In plumbing practice, materials used must be fit for service and safe for the system and public health. The rule targets materials that could fail or cause contamination, so they must not be used if they are unsafe or defective. That’s why the correct fill-in is “unsafe or defective.” Using anything described as unsafe or defective could compromise the integrity of the plumbing system, leading to leaks, failures, or health risks. The other options describe materials that would be acceptable or irrelevant to safety (safe or sound, new or unused, high-quality or good), so they don’t address the essential need to avoid compromised materials.

In plumbing practice, materials used must be fit for service and safe for the system and public health. The rule targets materials that could fail or cause contamination, so they must not be used if they are unsafe or defective. That’s why the correct fill-in is “unsafe or defective.” Using anything described as unsafe or defective could compromise the integrity of the plumbing system, leading to leaks, failures, or health risks. The other options describe materials that would be acceptable or irrelevant to safety (safe or sound, new or unused, high-quality or good), so they don’t address the essential need to avoid compromised materials.