These cylinders could be overfilled, which can cause them to release flammable propane gas unexpectedly, posing a risk of fires and explosions. hazard recalls

CPSC, AmeriGas Propane L.P. Announce Another Recall of Propane Cylinders

These 20-pound AmeriGas propane cylinders are white, and at the time of purchase, had a red, white and blue shrink-wrapped sleeve around them with the names "AmeriGas," "Prefilled Propane Xchange" and "PPX(r)" on them. Cylinders bearing a blue ink six-digit code just below the collar beginning with the letter X and ending with the number 7 are not included in this recall. As a reminder to all consumers, propane cylinders should not be stored or used indoors or in confined spaces. If you see, hear or smell leaking propane, immediately move far away from the cylinder and call the fire department from another location.