Hang this poster beside the gas outlets and near the master gas shut-off.
What is on the poster
A loose hose, a valve left open, a flame that went out while the gas kept flowing.
- Act at once. Treat a gas alarm as an emergency, even if no one smells gas.
- Put out every flame. Every open flame and anything burning.
- Switch nothing. No lights, appliances, telephones or mobile phones.
- Get everyone out. Leave the area at once, and get everyone out of it.
- Call from a safe place. Once safely away, call 9-1-1, then the gas supplier.
- Stay out. Until the gas professional or emergency responders say it is safe.
- Leave the gas off. A gas professional checks the system before it is turned back on.
Know where the master gas shut-off is before any burner is lit, and who uses it under the school's emergency procedure.
Built to the Science Safety Teaching Standard
This poster carries the SSTS mark. Like every Science Safety course, it is built to the Science Safety Teaching Standard (SSTS): every rule on it is taken from the body that governs it, at its current edition, and the source is printed on the poster, so you can check it yourself.
Stay current
When you get this poster, it is saved to your Science Safety account. If we revise the poster, or the Heat Sources module it comes from changes, we will email you, and the latest version will be waiting under Downloads in your account. Every revision carries its revision number and date at the bottom of the poster, so you can tell at a glance whether the copy on your wall is current.
Printing and hanging
- One-page PDF, US letter (8.5 by 11 inches).
- White background, so it prints clearly on any office or classroom printer without using much ink.
- Hang it beside the gas outlets.
- The QR code in the blue title band opens this page, so anyone can get their own copy.
- The QR code at the bottom opens the Heat Sources module.
Learn more
The Heat Sources module teaches the full topic this poster comes from.
Sources:
- Educational Messages Desk Reference, 2026 edition, section 19.7 – National Fire Protection Association (reviewed October 2, 2026)
Poster SSP-0066, Rev. 1, October 2026.
