Safety Gas Can 5 Gallon | What Makes One Safe

For the full breakdown, see our best Five Gallon Gas Can guide.

These cans include specific features like spring-loaded lids and pressure-relief mechanisms that reduce ignition risk. Knowing the official requirements and using the can correctly matters every time you handle gasoline.

What Is a 5-Gallon Safety Gas Can?

The USDA Forest Service publishes a specification (document 5100-622A) covering metal safety fuel cans that meet DOT transport requirements for flammable liquids.

A newer federal requirement from the CPSC took effect July 12, 2023 — all portable fuel containers must now include a flame mitigation device that prevents fuel vapor from igniting outside the can. This applies to every new safety can sold in the U.S.

Typical uses include fuel transport, storage, and dispensing for gasoline and other flammable liquids.

How To Use a 5-Gallon Safety Gas Can Safely

Filling. Place the can on the ground every time — never inside a truck bed, trunk, or on a boat deck where static charge and vapor buildup raise fire risk. Keep the nozzle in contact with the can during filling to dissipate static. Leave 5 to 10 percent headspace (do not fill beyond 95 percent capacity) so expanding fuel has room.

Storage. Close the cap tightly after each use. Keep cans in a cool, well-ventilated area away from pilot lights, stoves, heaters, electric mowers, and other ignition sources. The CPSC warns against storing fuel cans inside a house or basement, or near fuel-burning appliances.

Transport. Secure cans upright with tiedowns or a bracket so they cannot slide or tip. Avoid carrying them in a closed vehicle without ventilation — fuel vapor needs to disperse.

Maintenance. Periodically inspect the cap, spring closure, and flame arrester screen to confirm everything works properly, per Oregon’s guidance. A worn seal or clogged screen defeats the safety design.

Common Mistakes To Avoid

Filling a gas can inside a vehicle or on a plastic truck bed liner is one of the most frequent errors — it bypasses the static dissipation and ventilation that make ground-level filling safer. Using unapproved containers such as glass bottles or plastic milk jugs is another serious hazard, since they lack pressure relief and spill protection.

Storing fuel too close to heat sources or in poorly ventilated indoor spaces, leaving the can open or overfilled, and failing to maintain the spring lid and flame arrester are all avoidable risks. Transporting the can on its side also defeats the sealed-lid design and can cause leaks.

FAQs

Can I store a 5-gallon gas can in my garage?

Yes, but the CPSC advises keeping fuel containers away from water heaters, furnaces, pilot lights, and other ignition sources. Store in a cool, well-ventilated area — never inside the living space of a home or near fuel-burning appliances.

Are plastic safety cans as good as metal ones?

UL and FM approved polyethylene cans can meet the same safety standards as metal when tested against OSHA and NFPA criteria. Both types are acceptable as long as the container carries a recognized approval mark and includes a flame mitigation device.

Do I need a flame mitigation device on my gas can?

Yes — as of July 12, 2023, the CPSC requires all portable fuel containers sold in the U.S. to include a flame mitigation device that prevents vapor ignition outside the can. Older cans without one can still be used legally but cannot be sold as new.