How is service weight cast iron pipe marked?

• A. SW
• B. SV
• C. XH
• D. SP

Answer: (B)

Service weight cast iron pipe is designated by the marking "SV." This designation is part of the industry's standardized system for identifying the type and weight class of cast iron pipes. Service weight pipes are generally lighter than regular weight or extra-heavy pipes, making them suitable for various drainage and waste applications. Recognizing such markings is crucial for ensuring that the right type of pipe is used for specific plumbing and drainage needs.

In this context, the other markings represent different classifications or types of pipes. For instance, "SW" typically denotes standard weight, "XH" indicates extra-heavy, and "SP" might refer to special pipes or fittings not related specifically to service weight. Thus, understanding these markings is essential for pipefitting and ensuring compliance with project specifications and building codes.