For the overall installation and design of sprinkler systems in residential settings, which standard is most relevant?

• A. NFPA 20
• B. NFPA 101
• C. NFPA 13
• D. NFPA 22

Answer: (C)

The main guideline for how sprinkler systems are installed and designed is NFPA 13. It lays out the general requirements for automatic sprinkler systems—layout and spacing, pipe sizing, hydraulic calculations, water supply, and the various system types—and serves as the foundation for installing sprinklers in most occupancies, including residential. For low-rise homes, NFPA 13R is often used to simplify requirements, but it relies on NFPA 13 for the core design and installation details. NFPA 101 focuses on life-safety aspects and egress rather than the technical design of the sprinkler system, NFPA 20 covers fire pumps, and NFPA 22 deals with fire protection water tanks. So, for overall installation and design, NFPA 13 is the most relevant standard.