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Old 04-01-2013, 12:43 AM   #1
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Default Used air tank for CO2

I have a used compressed air tank and was wondering if it would be possible to fill it with CO2 for kegging. It is a 25 lb tank so it would be awesome to not have to worry about it for months. Thoughts?

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Old 04-01-2013, 12:55 AM   #2
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Compressed gas companies are usually very particular about using the correct bottle for a specific gas type.

Different gas bottles have various fitting sizes to make it hard to use the wrong gas for a particular application.

I don't think you are likely to get it filled with anything other than compressed air.

How hard can it be?
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Old 04-01-2013, 12:28 PM   #3
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Yeah, this doesn't sound safe to me. Compressed air tanks are usually pretty thin. CO2 tanks are thicker and meant to withstand over 1000 psi.
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Old 04-01-2013, 07:08 PM   #4
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Typical air tank will hold ~125psi, probably has a safety valve somewhere around 150psi. CO2 tanks hold pressures many times that.
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