ITM cycle tables
The recurring cycles that manufacture a fire-protection shop's week, each with its citation. These are the same encoded tables SprinklerBook's calendar runs on.
Sprinkler systems (NFPA 25, 2023 edition)
| Task | Cycle | Citation |
|---|---|---|
| Gauge inspection | Monthly | NFPA 25 §5.2.4.1 |
| Water flow alarm device test | Quarterly | NFPA 25 §5.3.3.1 |
| Main drain test | Annual | NFPA 25 §13.2.5.1 |
| Floor-level visual inspection of sprinklers and pipe | Annual | NFPA 25 §5.2 |
| Internal piping (obstruction) inspection | Every 5 years | NFPA 25 §14.2.1 |
| Gauge replacement or calibration test | Every 5 years | NFPA 25 §5.3.2 |
| Air and water pressure gauge inspection | Weekly | NFPA 25 §5.2.4.2 |
| Priming water level test | Quarterly | NFPA 25 §13.4.4.2.1 |
| Main drain test | Annual | NFPA 25 §13.2.5.1 |
| Dry pipe valve trip test (partial flow) | Annual | NFPA 25 §13.4.4.2.2 |
| Full flow trip test | Every 3 years | NFPA 25 §13.4.4.2.2.2 |
| Internal piping (obstruction) inspection | Every 5 years | NFPA 25 §14.2.1 |
Fire alarm (NFPA 72, 2022 edition)
| Task | Cycle | Citation |
|---|---|---|
| Supervisory signal device test | Quarterly | NFPA 72 Table 14.4.3.2 |
| Control equipment visual inspection | Semiannual | NFPA 72 Table 14.3.1 |
| Initiating device function test | Annual | NFPA 72 Table 14.4.3.2 |
| Battery load-voltage test | Annual | NFPA 72 Table 14.4.3.2 |
Portable extinguishers (NFPA 10, 2022 edition)
| Task | Cycle | Citation |
|---|---|---|
| Visual inspection | Monthly | NFPA 10 §7.2.2 |
| Annual external maintenance examination | Annual | NFPA 10 §7.3.1 |
Common questions
- How often does a wet sprinkler system need a main drain test?
- Annually, per NFPA 25 §13.2.5.1 as encoded in the 2023 edition. Local AHJ adoption can differ; the licensee's judgment governs.
- How often are dry system gauges inspected?
- Weekly, per NFPA 25 §5.2.4.2, unless pressure supervision alters the cycle in your adopted edition.
Verified against the cited editions as adopted, 2026-07-15; AHJ amendments vary. This page is a working reference, not code text and not advice; the licensee's judgment governs. See methodology.