We have used one on our fiver while on the storage lot for the last 10 years.Since most of the rigs in storage don't have a lock, I figure they would be much easier targets than ours.
"Propane tanks are good for 12 years from date of first certification (aka manufacture) then must be re-certified every 5 years." - This is correct information.I just had both tanks from our fiver re-certified at a local propane distributor in Englew...