Quote: (Originally Posted by
rigdiver)

Does TSA regs state the cylinder must be completely open? Military types say "less than 300 psi" I just recently travelled to Grand Cayman and had plugged cylinders in my carry on. Only one cylinder (dil) was inspected. Nothing was said about the plug.
Yep it does, it clearly statest that cylinders should be able to be visually inspected internally wihtout anything in the valve neck at all. Any cylinder with any sort of item blocking the neck that needs to be removed will be confiscated. We have used clear plastice held with a rubber band with no problems in the past (and we have had every other sort of problem with TSA), but now we just leave them open to save ourselves any form of grief
Removed previously posted material (should read all the posts before typing :-) )
Matt