NFPA 25 gives us some guidelines for the testing and replacement of sprinkler heads:
Sprinklers that have been in service over the times listed below must be submitted to a recognized testing laboratory acceptable to the authority having jurisdiction for field service testing
1. Sprinkler Head Testing:
Frequency:
- Standard Spray Sprinklers: NFPA 25 recommends testing standard spray sprinklers after 50 years, and every 10 years after that.
- Quick Response Sprinklers: These sprinklers are tested after 20 years, and then every 10 years after this.
- Dry Sprinklers: Dry sprinklers shall be tested after 10 years.
- Where Sprinklers have been in Service over 75 years, they shall be replaced, or tested every 5 years.
2. Sprinkler Head Replacement:
Reasons for Replacement:
- Corrosion: If there is visible corrosion on the sprinkler head, it should be replaced.
- Physical Damage: Any physical damage that affects the sprinkler’s integrity warrants replacement.
- Paint or Coating Buildup: If paint or other coatings have accumulated on the sprinkler, affecting its thermal response, replacement may be necessary.
- Manufacturing Recalls: In the event of a manufacturing recall or identified defect, affected sprinklers should be replaced promptly.
- Age: Sprinklers Manufactured prior to 1920 shall be replaced
Note:
- In certain environments where corrosive conditions are present, more frequent inspections and replacements may be necessary.
- Sprinkler heads exposed to harsh conditions, such as those in industrial settings, may require more frequent testing and replacement.
General Considerations:
- It’s crucial to follow the manufacturer’s recommendations for testing and replacement, as they may provide specific guidance based on the sprinkler’s design and intended use.
- NFPA 25 emphasizes the importance of using replacement sprinklers that are listed and approved for the specific system and application.
Conclusion:
Sprinklers will start to deteriorate over time, and it is absolutely crucial to test or replace them at the intervals outlined in NFPA 25 to ensure they activate efficiently, and in the required time when called upon. Quick Response Sprinklers should activate within 14-17 seconds, and Standard Sprinklers should activate within 60 seconds.
-Levi Rock
Vice President
Red Seal Fire Protection