NFPA 25: Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection System

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NFPA 25 Standard

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NFPA 25 Handbook

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2014 NFPA 25 Current Edition & Handbook


Prevent fire tragedies and loss with sprinkler care based on NFPA 25.

Improper maintenance of automatic sprinkler systems can result in less effectiveness, reduction of service life, or even catastrophic failure. That's why maintenance professionals, inspectors, and building owners rely on NFPA 25: Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems. Maximize time and efficiency without compromising reliability with requirements governing fire sprinkler systems -- including foam-water and fixed water spray systems, standpipe and hose systems, fire pumps, fire service piping and appurtenances, and water storage tanks. The Standard is so essential to proper sprinkler care, it's adopted by jurisdictions nationwide, and NFPA 13 requires installers leave a copy of NFPA 25 with property owners.

The 2011 edition of NFPA 25 clarifies the role the Standard plays in a fire protection plan. New terms in this edition define "critical deficiencies" and "noncritical deficiencies," so maintainers and owners can accurately identify corrective actions and prioritize repairs. Updated testing frequencies are based on the growing database of inspection, testing, and maintenance records. Other revisions clarify the roles and responsibilities of the building owner and the designated owner's representatives, to avoid critical oversights in sprinkler care. New Annex E classifies sprinkler repairs and has examples of sprinkler repairs and their classifications based on the new terms. A new Hazard Evaluation Form in Annex F helps you identify how building renovations could impact the adequacy of fire protection systems.

The 2008 edition of NFPA 25 introduces guidelines for a performance-based testing option that offers alternate, flexible means of compliance. While the previous edition of the Standard included performance-based testing on a limited basis in the "equivalency" option, the 2008 edition presents practical guidance on how to implement and monitor the process, subject to approval by the Authority Having Jurisdiction (AHJ). New coverage includes what variables to take into account when adjusting frequencies, which factors to consider in the transition to a performance-based test program, and how to establish a failure rate -- complete with suggested calculation methods and examples. Other changes include new component replacement testing tables for each type of water-based system, first-time coverage of dry pipe system testing, a new chapter on water mist systems maintenance, and a new impairment procedures requirement.

The 2002 edition of NFPA 25 adds new testing requirements for dry sprinklers, revised 5-year water tank inspection requirements, and new timing for testing of waterflow and supervisory switches. Other changes permit the use of ultrasonic (UT) and radiographic (RT) examinations to comply with obstruction investigation provisions. The 2002 edition also expands guidance for detecting Microbiologically Influenced Corrosion (MIC) and strategies for treatment.

Interested in other editions of NFPA 25? Use the drop down menu above to select the edition year you need.

NFPA®'s Redline PDF contains both the current NFPA document and a Redline version of the document which shows changes from the previous edition marked in color. With the Redline you can quickly spot changed sections and tell specifically what has been changed from the previous edition, saving time and confusion.

  • Changed sections are marked with a vertical rule.
  • Deleted material is shown in red strikethrough type.
  • New material appears in blue underscored type.


Sample (NEC® 2014)

411.2411.3 Definition. Low-Voltage Lighting Systems.


(A) General. Lighting Ssystems Ooperating at 30 Volts- volts or  Less. A lighting system consisting less shall consist of an isolating power supply, the low-voltage luminaires, and associated equipment that are all identified for the use. The output circuits of the power supply are shall be rated for not more than 25 amperes and  operate at 30 volts (42.4 volts peak) or lessmaximum under all load conditions.


(B) Class 2. Listed Class 2 lighting equipment shall be rated in conformance with Chapter 9, Table 11(A) or Table 11(B).


411.3411.4 Listing Required. Lighting systems operating at 30 volts or less shall comply with 411.3(A)411.4(A) or 

411.3(B).411.4(B). Class 2 power sources and lighting equipment connected to Class 2 power sources shall be llisted.