Which term denotes pipes made from materials other than metals?

• A. Effective Date
• B. Nonmetallic Pipe Materials
• C. Operating Pressure
• D. Freeze Protection

Answer: (B)

Nonmetallic Pipe Materials is the label used in NFPA 13R to describe piping made from plastics or other nonmetallic substances. This category distinguishes pipes that aren’t metal from metallic ones, covering materials like PVC, CPVC, and PEX. Knowing this helps you apply the right installation methods, joint methods (such as solvent cement or mechanical fittings), and understand the different temperature and pressure limitations that come with plastic piping in residential sprinkler systems. The other terms in the choices refer to timing (Effective Date), system pressure (Operating Pressure), or a condition to prevent (Freeze Protection), none of which describe the material type of the piping.