Yes, propane tanks do expire. Most standard propane cylinders used for backyard grills are certified for 12 years from the manufacture date. After that period, the tank must either be recertified or replaced.
This safety requirement helps ensure that propane cylinders remain structurally sound and safe to use. Over time, tanks can weaken due to corrosion, wear, and outdoor exposure.
If your tank has expired, many propane exchange programs allow you to swap it for a newer inspected tank. If you are looking for places that offer this service, see our guide to propane tank exchange near you.
Do Propane Tanks Expire?
Yes. Most propane tanks used for grills and outdoor cooking equipment are certified for 12 years from the original manufacture date. After that, the tank must be recertified before it can legally be refilled, or it must be replaced.
How long propane tanks are good for
A standard 20 lb propane tank is usually certified for:
- 12 years from the original manufacture date
- 5 years after recertification in many cases
After the initial 12-year period, the tank must be inspected and recertified by an approved professional if you want to continue using it for refills.
Where to find the expiration date on a propane tank
The expiration timeline is based on the manufacture date stamped on the collar of the propane tank. This collar is the metal ring around the top of the tank that protects the valve.
The date is usually stamped in a month-year format.
For example:
- 06 20 means June 2020
- The tank would typically expire in June 2032
What happens if a propane tank expires?
If a propane tank reaches its expiration date, it usually cannot be legally refilled until it is recertified. Many refill stations will refuse to refill an expired tank for safety reasons.
However, expired tanks are often accepted by propane exchange programs. When you exchange an old tank, the vendor replaces it with a newer certified cylinder.
Can you exchange an expired propane tank?
Yes. Most propane exchange programs accept expired tanks as long as they are not leaking, badly rusted, or severely damaged.
This is one of the easiest ways to replace an expired cylinder. Many retailers, hardware stores, gas stations, and grocery stores offer propane tank exchanges.
You can compare typical prices in our guide to propane tank exchange cost.
Should you recertify or exchange an old propane tank?
For many people, exchanging an expired propane tank is easier than recertifying it. Exchange programs are quick, widely available, and give you a replacement tank that has already been inspected.
If your goal is convenience, an exchange is often the simplest option. If your tank is still in excellent condition and you have access to a refill station that offers recertification, keeping the same tank may still make sense.
Conclusion
Propane tanks do expire, usually 12 years after the manufacture date stamped on the tank collar. Once a tank reaches that point, it must either be recertified or replaced before it can be refilled. Fortunately, many propane exchange programs allow you to swap an expired tank for a newer inspected cylinder, making replacement quick and convenient.