You might want to look a little deeper. Your thread began asking about fittings. Any response? And I don't know about yours but, my local FD can only fill to 2260 psi. That is what they are regulated at because that is what the personal breathing tanks hold.
What will you be hauling this with?American Airworks' UN ISO DOT cylinder air cascade systems are designed for ... AC40060 - UN/ISO/DOT 6000 PSI/414 BAR, 510 CF, 202 Lbs - 91 Kg empty
Rajod, about 80% of the time I see your threads or replies, they seem to me to be condescending.Anyway, just don't do it unless you can get a proper regulator on the cheap. Also, even though they may use them now in a cascade setup, have they been fed dry air? They probably have but good to check into.
Rajod..They make a two wheeled hand truck that has (wheelie bar) type wheels that allow the loaded hand truck to be tilted back and moved around very easily. I have a tank just as you describe in my barn that was here when I moved in. I haven't dug it out to look at it. I'm sure it would need hydro and visual inspections before anyone would fill it.
You're acting condescending toward the answers given, which you should have expected would be posted. I saw trouble when I saw the thread title. LOL.I've seen the 6000 psi regulators on Ebay for like $200+ but think those were meant for nitrogen. Not sure if they'd work for compressed air or not.I still say pass on the free deal. I've been a weight lifter most of my life and even now it's bothersome filling a lighter SCUBA tank, nevermind somthing this heavy. And just for the record, when I ran our laser at my work we had 6 bottles of these on hand all the time. Most would use the tank dolly to move them through the building but the delivery guy showed me a trick to roll two at a time together by creating like an x out of them and kicking them with your foot, more like push them and not kick them. It's not a superman type of feat, but it still blew peoples' minds.
Sounds like the firestation would fill them for you there is a hydro test or not on the tank . To be safe though it would be a good idea