Have you checked the service date on your gas cylinders lately??
The "in service" (either new or recertified) date is stamped on the collar, month and year. Cylinders more than 12 years old cannot be legally refilled under DOT (Federal) regulations. I think Transport Canada has the same rule. This applies to RV, BBQ grill, an any other cylinders.
The refill-jockeys at most retailers don't check, but I just had both of my 30# cylinders refused by a clerk who was paying attention.
My fault and I have ordered replacements, but interesting to know about.
Formerly posting as "littleblackdog"
Martha, Allen, & Blackjack
2006 Chevy 3500 D/A LB SRW, RVND 7710
Previously: 2008 Titanium 30E35SA. Currently no trailer due to age & mobility problems. Very sad!
"Real Jeeps have round headlights"