captain
Contributor
I guess if your a CE hydro facility, yep you can hydro them.
And if you never transport them on public roads, yep you can fill them.
But as most and your self pointed out, most dive shops wont fill them, for want ever the reason.
See my post and Oxyhackers post in this thread.
http://www.scubaboard.com/forums/tanks-valves-bands/322097-us-tank-europe-vice-versa.html