NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems 2026

Get the latest edition to help ensure the integrity of critical water-based fire protection systems, minimize hazards, and protect lives and property. The updated and expanded NFPA 25®, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, is the most current and comprehensive resource covering the inspection, testing, and maintenance (ITM) of water-based fire protection systems.

Incorporated by reference in many U.S. states, NFPA 25 provides essential requirements to help ensure fire protection systems are reliable and ready to perform when an emergency occurs.

Key Updates in the 2026 Edition include:

• New replacement requirements for sprinklers installed in dwelling units for more than 50 years, requiring replacement with new fast-response sprinklers or compliance with a thermal sensitivity test

• Revised limitations on permissible antifreeze mixtures

• New ITM requirements added to Chapter 13

• Additional guidance on when sprinklers exposed to a fire event must be replaced

An essential standard for facility managers, inspectors, contractors, designers, and authorities having jurisdiction (AHJs), NFPA 25 (2026) supports safer, more reliable fire protection system performance.