NEWreckDiver:Well we both know that there is more than one way to skin a cat..
LOL, Yea, I'm not big on cats though. I'm a dog person..LOL
NEWreckDiver:No, I don't and won't dream of storing O2 at such a high pressure. You just lay in the O2 first and then add the appropriate top off gas. And I agree. All of this would be hard without a fill panel..
I fill my RB cylinders off my booster to 3000 to 3500psi all the time. Just do it slow. And keep everything clean. But banking pure O2 to 4500psi is a pain. Need a good panel and booster set up. Set up for Pure O2. And I'd rather not. Super expensive.
NEWreckDiver:This tread start as “Which is better, LP or HP”. I think we would both agree. It is completely a personal preference.
Well, Not really agree. Thread start was "Which is better for Nitrox, LP or HP". And I still think it's easier to blend in a LP tank. You don't have to build as much pressure when topping off. So you create less heat from compression. Which is good. You also have a shot at not dumping the gas to build another mix. Or, More of a shot then a HP.
I have both HP and LP tanks. Lucky I guess. And almost all my blends are done in the LP's. It's just easier. And uses less gas for me. If your shop has all the equipment for it. Yea, Your not gonna have a problem. But if it doesn't. LP's are easier again. Not all shops have the equipment.
If they charge you $12 a fill no matter what. Then having them dump and fill isn't going to cause you a problem.
But an 80/20 deco blend in a 3000psi tank needs 2400psi O2. And O2 is usually 2400psi tank. So if you want a 80/20 in a HP. You'd need to put more pressure in the tank then you could get from a O2 cylinder. You'd have to use a booster. And all shops don't have them. None in my area have boosters.
And if you ever want to fill your own. Much easier again with LP's. Have your shop top off with air. You add the O2.