Ok let’s get more factual here. DOT regulate’s allot of thing’s. Can someone come up with a link with the exact wording.
The valve is separate from the tank any problem with a valve does not condem a tank. Repair’s and or modification’s can only be done by the manufacturers has to be untrue because dive shop’s rebuild valve’s all the time. Witch would be a repair. Tank’s on the other hand if they have unacceptable cracks, pits fail hydro or do not meet any of Dot minimum standard’s it is to be condemned. I am unsure what the manufacturer does. But shippers do not allow tank’s shipped without removal of the valve. Also the valve and the tank are two different manufacturers.