Compliance · 7 min read
Fire Extinguisher Service Schedule for Tennessee Businesses
Service dates are not optional reminders. They are the maintenance cycle that keeps an extinguisher available and dependable when a small fire starts.
The standard service cycle
| Interval | Typical work | Who performs it |
|---|---|---|
| About every 30 days | Visual inspection for access and obvious readiness | Owner or designated employee |
| Every 1 year | Maintenance examination and service tag | Qualified service technician |
| Every 6 years | Internal examination for stored-pressure dry chemical units | Qualified service technician |
| Every 12 years | Hydrostatic pressure test for applicable cylinders | Qualified testing provider |
This overview follows the commonly applicable cycle in NFPA 10 (2022 Edition). The extinguisher type, manufacture date, prior service history, and local Tennessee AHJ rules determine the exact work due.
Annual maintenance: every 1 year
A qualified technician examines the extinguisher for mechanical damage, agent condition, seals, labels, pressure or weight as applicable, and proper operation. The technician documents the maintenance on the service tag.
- Schedule before the current annual tag expires.
- Include units in cabinets, vehicles, and remote areas.
- Ask the technician to identify units that cannot be economically repaired.
Six-year internal examination
Stored-pressure dry chemical extinguishers commonly require an internal examination at 6-year intervals. The unit is emptied, opened, inspected internally, reassembled, recharged, and properly documented.
Twelve-year hydrostatic test
Hydrostatic testing verifies that applicable extinguisher cylinders can safely hold pressure. Many stored-pressure dry chemical cylinders are tested on a 12-year interval, but always follow the cylinder marking, NFPA 10, and the manufacturer’s instructions.
- 1Review records — Identify the extinguisher type, prior test date, and current due date.
- 2Remove for testing — Use temporary replacement protection where the unit is needed.
- 3Test and service — Have an authorized provider complete the required test and recharge work.
- 4Return only documented units — Verify the unit is correctly tagged and placed back in its assigned location.
Build a dependable service program
Keep an asset list with each unit’s location, type, size, serial number where used, annual date, 6-year date, and hydrostatic date. Review it after remodels, moves, or changes in hazards.
Common questions
- Is annual service required if the gauge looks good?
- Yes. A gauge is only one visual indication; annual maintenance is a separate qualified examination.
- Which extinguishers need a 6-year internal examination?
- Stored-pressure dry chemical extinguishers commonly do. Confirm the requirements for each unit type with a qualified provider.
- Does every extinguisher have a 12-year hydrostatic interval?
- No. Test intervals vary by cylinder and agent type. Review the applicable marking, NFPA 10 (2022 Edition), and manufacturer instructions.
- Can local rules change the schedule?
- Yes. Your Tennessee AHJ may impose stricter or additional requirements.
Last reviewed August 2026. General guidance only — your local authority having jurisdiction has the final word on your building.