# Extinguisher inspection schedule planner

Plan reminders for a confirmed refillable stored pressure dry chemical extinguisher with a twelve-year hydrostatic interval. This tool does not cover other types. Confirm the shell material and records with a service company first.

Use the tool on the [web page](https://extinguishers.fyi/tools/extinguisher-inspection-schedule). It works without JavaScript.

## How to use it

1. Choose has your contractor confirmed this equipment fits the stated scope?.
2. Enter last documented monthly visual check.
3. Enter last documented annual maintenance.
4. Enter last qualifying internal maintenance, recharge or hydro test.
5. Enter last hydrostatic test or confirmed initial manufacture baseline.
6. Read the result.

## How it works

Cornell LII, OSHA 29 CFR 1910.157(e)(2)-(4) and Table L-1, fetched 2026-11-10: https://www.law.cornell.edu/cfr/text/29/1910.157 . Monthly visual checks, annual maintenance, and six-year maintenance for the covered stored pressure dry chemical units.

Table L-1 gives a twelve-year hydrostatic interval for stored pressure dry chemical units with mild steel, brazed brass or aluminum shells. It gives other intervals for other types. Non-refillable disposable containers are exempt from the six-year requirement. Do not use this planner for them.

The planner adds one month, twelve months, six years or twelve years to the corresponding documented baseline. These are calendar reminders. Short months use the last calendar day. Earlier service may be needed because of condition, manufacturer instructions or local requirements.

OSHA (e)(4) says recharge or hydrostatic testing restarts the six-year requirement for the covered units. Keep that date separate from an annual visit. Do not reset hydrostatic history after a recharge alone.

Unknown records, future baseline dates or an unconfirmed type do not produce due dates. Obtain a service review instead. This is a US regulatory planning model. Confirm provincial and local requirements before using it for Canadian premises.

> Reminder aid only. It does not approve equipment or establish compliance. Do not wait for a reminder if damage or another defect is found. Ask the service company to resolve unknown dates.

## Questions

### Does this cover carbon dioxide extinguishers?

No. OSHA Table L-1 gives carbon dioxide units a five-year hydrostatic interval. This tool deliberately covers only the stated dry chemical scope.