Are drain piping, drain valves, and signs required to be listed?

The correct answer is that drain piping, drain valves, and signs do not need to be listed. This is because the National Fire Protection Association (NFPA) codes, specifically NFPA 13, typically require that certain components in fire protection systems be listed or labeled to ensure safety and standard performance. However, drain piping and the associated components are not generally classified under the same stringent requirements as primary system components such as sprinkler heads or valves.

Drain piping primarily serves a utility function in the system, which means its materials and assembly do not invoke the same level of performance characteristics required by listed components. Additionally, while signage is important for indicating system components, it does not carry the same need for listing, as it serves more as a visual aid rather than a critical safety or operational component.

Understanding these distinctions is essential for compliance with fire protection codes and maintaining the safety and effectiveness of sprinkler systems.