30-09-17, 12:37 AM
:eek I'm a bit rusty as I don't use the tools so much nowadays fella, but have a look at the back of the regulators- there should be a date stamp or a date code. I'd assume that they're well past it if they've been lying as long as you say. Where I work they'd be replaced before use but It really is up to you fella. If you want to test a flashback unit- fill the hose, turn off at the keys at bottle and remove the regulator. The back flow will pop the lever out if all is okay. Refit the regulator and reset the lever. Remember it's left hand thread on the acetylene fittings so it turns the other way.
Treat everything in life the way a dog would- if you can't eat it or foc it, forget it.