Mike Klieb
Contributor
I know this my seem like a stupid question and I'm pretty sure I know the answer but I'm going to ask anyway. Is there any difference in the air other than the connection to the tank?
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I did it for years. As long as the FD air is tested and Grade E, you're good to go. I just had to get an adapter for my tanks
My son is a firefighter and he said if it was the same I could fill my tanks there. so I figured I would do that because its closer than the dive shop.