What piping materials are permissible in sprinkler systems according to NFPA 13?

The correct choice is based on the guidelines outlined in NFPA 13, which provides specific criteria for the types of materials that may be used in the construction of sprinkler systems. NFPA 13 permits a variety of piping materials that have been tested and proven to meet the necessary performance standards for fire protection.

Steel and ductile iron are widely accepted for their durability and ability to withstand high pressures, making them ideal for use in fire sprinkler systems. Copper is another material frequently used, particularly in systems where corrosion resistance is a concern. Additionally, certain plastics, such as CPVC (Chlorinated Polyvinyl Chloride), are allowed in specific applications due to their lightweight nature and resistance to corrosion, provided they comply with the standards set forth for their use in sprinkler systems.

In contrast, the other options do not align with NFPA 13’s requirements. For instance, PVC is generally not permitted for use in fire sprinkler systems due to its low fire resistance compared to the approved materials. Additionally, using materials like wood and fiberglass is not in compliance with NFPA 13, as they do not meet the fire safety standards required for durability and reliability in high-risk environments. The option suggesting any material that is readily available ignores the stringent testing and performance