Tag

impairment

• July 24, 2026 · 4 min read

  Deficiency or Impairment? NFPA 25's Three Tiers and the Chapter 15 Procedure

  What separates a noncritical deficiency from a critical one from a full impairment under NFPA 25 — and the exact Chapter 15 steps required when a sprinkler system comes out of service.