What standard requires inspections of firestone systems in plumbing?

The standard that requires inspections of firestone (or fire protection) systems in plumbing is ASTM E2174. This standard outlines the requirements for the inspection of firestopping systems in order to ensure that they are functioning properly in safeguarding against the spread of fire through openings in walls and floors. Proper installation and inspection of these systems are crucial, as they play a vital role in maintaining building safety and compliance with building codes.

The importance of ASTM E2174 lies in its focus on the effectiveness of firestopping materials and assemblies. By adhering to this standard, professionals can confirm that firestopping systems are installed correctly, which is essential for life safety and property protection.

Other choices listed do not pertain to the inspection of fire protection systems. ASTM E2674 refers to a different aspect of construction materials, ASTM D2665 pertains to polyvinyl chloride (PVC) pipe, and ASTM D2784 focuses on specific aspects of plastic piping materials. Therefore, ASTM E2174 is the correct standard associated with inspections of firestone systems in plumbing.