NFPA 25 2026 Edition: What Changes for Building Owners
The 2026 edition of NFPA 25, the standard for the inspection, testing and maintenance of water-based fire protection systems, is the latest edition and was issued by NFPA in 2025. It brings practical changes for building owners and facility managers: who may carry out the work, how impairments are handled, and when sprinkler cover plates and some older sprinklers in dwelling units must be replaced.
What changed in the 2026 edition
| Item | What is new | What it means for owners |
|---|---|---|
| Qualified personnel | The list of qualification routes moved from the mandatory text to the annex as examples. Personnel must now be qualified for the specific tasks they perform (4.1.1.3), and detailed qualification rules are left to the authority having jurisdiction (AHJ) | Site staff can handle simple tasks they are qualified for, while technical testing is usually best left to a specialist contractor |
| Impairments | Notification is required as soon as an impairment is identified, for both preplanned and emergency impairments (4.1.4). Deficiencies are corrected within a time frame approved by the AHJ, and impairments are managed under an approved Chapter 15 impairment program until corrected (4.1.6.2) | Record every impairment: cause, affected part of the system, start time and expected duration, and notify the required parties as soon as it is found |
| Ice in piping | Ice in the piping between the water supply and any discharge device (such as a sprinkler) or hose connection means the system is impaired. Components containing ice must be completely thawed out or replaced before the system returns to service (4.1.2.6.1 and 4.1.2.6.2) | Relevant mainly to cold stores and freezers protected by dry or preaction systems |
| Corrosion mitigation | Where a dry pipe or preaction system was designed with an increased Hazen-Williams C value (120) because of a technology permitted by NFPA 13, such as nitrogen generation or a corrosion inhibitor, that technology must be inspected, tested and maintained per NFPA 25 and the manufacturer’s instructions. If it is not repaired or replaced, the system must be hydraulically recalculated and modified as necessary (4.1.5) | This equipment now belongs in the maintenance contract scope |
| Recessed and concealed sprinkler covers | For recessed, flush and concealed sprinklers, escutcheons and cover plates must be replaced not only when missing but also when damaged, when attached to the ceiling or wall, or when corrosion, loading or non-factory paint is detrimental to sprinkler performance. If the listed part is no longer available, the sprinkler assembly must be replaced (5.2.1.1.5) | Painting and fit-out work can create a mandatory replacement item |
| Dwelling-unit sprinklers | Sprinklers installed for 50 years in dwelling units are replaced with fast-response sprinklers, or representative samples are tested for thermal sensitivity with a response time index (RTI) no greater than 65 (m·s)½ (5.3.1.1.1.7). The general 50-year rule for all sprinklers is not new | Relevant to older sprinklered residential buildings |
NFPA corrected the numbering of sections 4.1.5 and 4.1.6 in Errata 25-26-1, issued in October 2025, so early printings of the edition may show different section numbers.
What it means for facilities in Saudi Arabia
A new edition of NFPA 25 does not automatically become mandatory in Saudi Arabia. The edition that applies to a project is set by the referenced standards of the Saudi Fire Protection Code (SBC 801) and by Civil Defense and the authority responsible for the project, and an earlier edition may still be the one in force. Most of these changes, however, clarify sound maintenance practice, and following them early reduces inspection findings and protects system readiness.
Practical steps now
- Review your impairment log and make sure each impairment records its cause, duration and repair date, and that notification happens as soon as it is found.
- Inspect concealed and recessed sprinkler covers in areas where ceilings were painted or altered.
- Review the spare sprinkler cabinet: check that the sprinkler types in it match those installed in the building and that a suitable wrench is there for each type.
- If you have a dry or preaction system designed around a nitrogen generator or a corrosion inhibitor, add that equipment to the periodic maintenance schedule.
- Agree with your maintenance contractor which NFPA 25 edition your contract follows and how reports will be documented.
For the technical inspection and testing schedules, see our NFPA 25 inspection, testing and maintenance guide and wet, dry, preaction and deluge sprinkler systems compared.
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