Most RV owners focus on keeping their propane tanks full, but the certification date stamped on every tank is what actually determines whether you can get a refill. Propane tanks must be recertified every 12 years from their manufacture date, and many fill stations will refuse service once that deadline passes, regardless of how much propane you have left.
The problem catches people off guard because an expired tank might still have weeks of propane remaining. You’ll discover the issue when you pull up to a fill station and get turned away, often in an unfamiliar area where finding recertification service becomes a scramble. Recertification involves a visual inspection and pressure test that costs around $20-40 per tank, but not every propane supplier offers this service.
Here’s what experienced RVers do: check your tank dates before any major trip, especially if you’ve owned your rig for several years. The manufacture date is stamped into the metal collar around the valve — look for a two-letter month code followed by a two-digit year. If you’re within six months of expiration, get recertification done at home where you have time to shop around for service.
Many owners keep one spare tank specifically to avoid this situation. Having a recently certified backup means you’re never completely without propane while dealing with recertification. It’s a small investment that prevents a lot of stress, particularly if you rely on propane for heating or refrigeration during travel.