Routine vs Non-Routine Testing

Whether you’re following the 2023 edition of NFPA 25 or earlier editions, the message remains clear: sprinkler systems must be maintained to function properly in the event of a fire. Part of this maintenance includes regular testing, a critical part of code compliance designed to protect lives, property, and the wider community. According to section A.5.3.1 of the NFPA 25 standard, routine sprinkler testing is intended to confirm that sprinklers have retained the necessary sensitivity to activate as expected during a fire. On the other hand, non-routine testing is used to investigate specific concerns or unusual conditions that fall outside the standard testing schedule. Throughout this blog series, we’ve unpacked essential insights into NFPA 25 sprinkler testing, covering everything from the field service test and proper sampling procedures to common causes of sprinkler failures. Now, in the fourth and final segment, we dive deeper into two different types of testing. Specifically, we’re exploring the difference between routine and non-routine testing. Understanding when and why each type is performed is critical to not only safety compliance but making sure your sprinkler system is ready when it’s needed most.

Routine Testing

Routine testing is a foundational element of NFPA 25, consistently emphasized across both current and earlier editions. However, the recommended frequency for periodic testing may vary depending on the edition being followed. These differences reflect the evolving nature of the standard, which is continually updated to incorporate new data, field findings, and advancements in fire protection practices.

While routine testing is a core requirement of NFPA 25, the timing and frequency of that testing aren’t one-size-fits-all. Instead, they depend on several important factors—including when the sprinklers were installed, the type of sprinklers in use, and the environment in which they are in. These elements all play a role in determining how often sprinklers should be tested to maintain their effectiveness and compliance with the standard. The illustration below highlights the periodic testing intervals required for routine sprinkler testing, providing a clear visual reference based on these factors:

Click here to download our Fire Sprinkler Testing Intervals fact card. 

Non-Routine

Non-routine testing refers to submitting sprinkler samples for testing outside of the standard testing intervals. That could be before the initial testing milestone after installation, or between the typical 5- or 10-year retest periods. During annual floor-level inspections, if you or the responsible party notice any signs of damage, corrosion, or other concerns that could impact sprinkler performance, it’s completely acceptable and often wise to send those sprinklers in for testing. This proactive approach helps address potential issues before they compromise system reliability.

As discussed in Part 2 of our blog series on sampling procedures, NFPA 25 requires that routine sprinkler testing samples include at least four sprinklers or 1% of the total sprinklers in the designated sample area—whichever is greater. This helps assures a representative assessment of the system’s condition. However, if you choose to submit sprinklers for testing outside of the routine testing window, this minimum sample size requirement does not apply. Non-routine testing allows more flexibility, especially when addressing specific concerns or potential issues.

Whether you're testing within your routine interval or addressing concerns through non-routine testing, Dyne Fire Protection Labs, an NFPA Global Solutions Company, is a reliable resource. They make the process easy by offering free sample kits, complimentary shipping, and fast turnaround times—with results delivered within five business days.

Understanding when routine and non-routine sprinkler testing is needed is key to maintaining a reliable fire protection system and staying compliant with NFPA 25. By following the appropriate testing schedule and knowing when to take extra steps, you can help verify your system performs when it matters most. Whether you're just starting your testing program or looking to address specific concerns, having the right knowledge—and the right partners—makes all the difference.

We appreciate you following along with our four-part blog series on sprinkler testing. From field service testing and sampling procedures to identifying causes of sprinkler failure and understanding the importance of routine and non-routine testing, we hope this series has provided valuable insights to support your fire protection efforts. Stay tuned for more helpful content and updates in future blogs from NFPA Global Solutions and our partners!