I wonder if, or why, SCBA gear would use different tank valves than SCUBA gear such that any dive shop couldn't fill one. Good point. I don't actually know for

I wonder if, or why, SCBA gear would use different tank valves than SCUBA gear such that any dive shop couldn't fill one. Good point. I don't actually know for a fact that they are different. It may actually be the case that a dive shop would have the capability to fill an SCBA bottle. Now, whether or not they'd be willing to do it is a different question.