All materials in the fire protection system must be listed and approved.

All materials in the fire protection system must be listed and approved.

• A. Replaced every 5 years
• B. UL Listed
• C. Approved by AHJ only
• D. Listed and Approved

Answer: (D)

All materials in a fire protection system must be both listed and approved. Listing means a recognized testing organization has evaluated the item to applicable standards, verified its performance, and provided labeling and data. Approval by the authority having jurisdiction (AHJ) ensures the specific product is acceptable for use in the particular building and installation, considering site conditions and code requirements. Using a product that is only listed or only approved can lead to gaps in compliance, because listing alone confirms performance in general but not its suitability for a specific project, while AHJ approval alone may lack independent verification of standard conformance. Therefore, the best practice is to have materials that are both listed and approved.

All materials in a fire protection system must be both listed and approved. Listing means a recognized testing organization has evaluated the item to applicable standards, verified its performance, and provided labeling and data. Approval by the authority having jurisdiction (AHJ) ensures the specific product is acceptable for use in the particular building and installation, considering site conditions and code requirements. Using a product that is only listed or only approved can lead to gaps in compliance, because listing alone confirms performance in general but not its suitability for a specific project, while AHJ approval alone may lack independent verification of standard conformance. Therefore, the best practice is to have materials that are both listed and approved.