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Old 01-02-2013, 12:14 AM   #1
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Default just purchased 20lb co2 tank-how do I?

I just bought a 20 lb co2 tank, I hope I didn't make a bad decision, It was full of co2, and paid 75.00 for it, I have a few questions for the experienced.
1- how do I know if it is steel or aluminum and what is better to own?
2- how do I know if the co2 is good or stale? does it go bad?
3- can I store it in below freezing temps until I get my kegging operation going. I dont want it in my house right now, its about 10-20 degrees out side this time of year, will this damage the tank in anyway?

It has a date of 3/11 the guy said it was good till 2016 is this your experience?

It looks like it was used for diving as it is coated in a black plastic material and has diving stickers on it, Is this waht divers use when diving?


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Old 01-02-2013, 12:21 AM   #2
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It doesn't go bad and you can store it outside just fine.
I run co2 on my rockcrawler mounted on the cage but exposed to weather and go snow wheeling in colder temps than that with no issues.


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Old 01-02-2013, 12:25 AM   #3
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Are you sure you bought a co2 tank or an air tank. Its kinda hard for divers to survive under water on co2. It could a tank that paint ballers used I guess
Anyway if you bought a 20lb tank for 75.00 I would think that is a great deal. Used 5 lbs around me are that much.
As far as steel or aluminum I wouldn't think one is better than the other for what you are using it for the only difference should be the weight. The date on the bottle is a hydro date. If I remember right it needs to be hydro tested every 7 years. As long as if passes, the tank should be good.
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Old 01-02-2013, 12:29 AM   #4
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You may want to post a picture of the valve and tank. Scuba does not use co2, at least not for recreational divers.
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Old 01-02-2013, 12:38 AM   #5
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You need to take it to a welding supply store and have them tell you if its a o2 tank or a co2 tank, if its a Divers o2 tank you can Not carb beer with it, it is oxygen.

If it is a o2 and not a co2 tank you might be able to get them to trade with you.

Cheers
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Old 01-02-2013, 02:45 AM   #6
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You can also take the tank to a fire safety store to see if they will refill it for you. Usually the welding stores will do an exchange instead of refills.
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Old 01-02-2013, 02:55 AM   #7
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Divers use air, not O2. Post a pic...
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Old 01-02-2013, 02:01 PM   #8
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If you look on the neck of the tank for the working pressure. A SCUBA tank is rated for 3000 psi and from what I've seen of my co2tamk is that it's rated for 1800psi. Also the valve would be very different. A co2 tank has threads on the outside diameter. A SCUBA tank has what's called a yoke valve, just a indent with a hole in it and an o ring layed in around it. Or the have a DIN valve which has an internal diameter thread. In either case. From what I've seen, co2 tanks have the valve knob on top and SCUBA has the valve on the side..
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Old 01-02-2013, 04:55 PM   #9
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To tell if it is steel vs aluminum just remember, steel rusts. It is not uncommon to see a little rust on the bottom rim of a used steel tank. Will not hurt anything unless it is rusted through. As for the difference... Aluminum costs more.

See the above posts for the O2/CO2 bit.
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Old 01-02-2013, 05:56 PM   #10
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[IMG]K:\DCIM\100C1450[/IMG]

I dont know if this will work, i've never used this forum to upload a photo.


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