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Old 08-13-2008, 01:06 AM   #11
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Here's a very interesting thread on filling from 50# tanks in a paintball forum. Very informative IMHO for anyone interested in doing this.

http://www.paintballforum.com/air-systems/163429-50-pound-co2-tank.html

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Old 08-13-2008, 01:10 AM   #12
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Quote:
Originally Posted by ballbuster View Post
Does anybody have a picture of a siphon tube? Just asken, Never seen one I dont think.
It looks just like a Dip tube in a cornie. They are inside the tank, so you can't see it.
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Old 08-13-2008, 10:09 AM   #13
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But we use gas co2 instead of liquid co2 to push beer with. With the diptube in place we would have to invert the tank to use it. Wouldn't this cause us to get liquid co2 if placed in the upright position?

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Old 08-13-2008, 01:28 PM   #14
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Quote:
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But we use gas co2 instead of liquid co2 to push beer with. With the diptube in place we would have to invert the tank to use it. Wouldn't this cause us to get liquid co2 if placed in the upright position?
He is transferring liquid Co2 from a larger cylinder to smaller ones, which in turn he will use for his beer.
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Old 08-13-2008, 01:34 PM   #15
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Fortunately, I don;t have a need to fill my own tanks but I have often considered getting a large 100# bottle for CO2. I find them on the cheap around here and it makes sense to me to get one in that the service will pick it up and swap with a full. Since I rarely leave the valve open there is no concern for a leak draining out the tank and the frequency of fill is drastically reduced.

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Old 08-14-2008, 05:11 PM   #16
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If one were to do something like this on a regular basis, I imagine a safe and easy way would be to fabricate some sort of stand with a cradle that pivots. Obviously it would have to be robust enough to handle the weight of the tank. Strap or chain the tank into place and just flip it over. Properly balanced you could probably rotate it with your finger.
Am I making any sense? Over-engineering things?

Chris

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Old 08-14-2008, 05:18 PM   #17
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Quote:
Originally Posted by ChrisS68 View Post
If one were to do something like this on a regular basis, I imagine a safe and easy way would be to fabricate some sort of stand with a cradle that pivots. Obviously it would have to be robust enough to handle the weight of the tank. Strap or chain the tank into place and just flip it over. Properly balanced you could probably rotate it with your finger.
Am I making any sense? Over-engineering things?

Chris
This was my plan....when I was planning on using the big tank for both Pushing and Filling.
Now I'm happy with the 5# and am content to just trade for a tank with a siphon tube.
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Old 09-17-2008, 01:07 AM   #18
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I went to airgas today to get some gas and talked to the guy for awhile about getting a 50 lb tank with a dip tube. He said that you don't want to fill a smaller tank like this as all you will fill the smaller tank with is liquid C02 and that you could only get the smaller tank filled up to about 90%. I tried arguing with him a bit that the liquid would covert to gas as it escaped the smaller tank but he was sure that it was a bad idea. I honestly think he was full of it, but he was willing to put his entire C02 career on it. Thoughts?

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Old 09-17-2008, 02:12 AM   #19
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On the one had, he's a moron. You want liquid CO2, 90% is fine (BK is saying 80% and is happy with it) and of course liquid CO2 turns to gas - that's how any CO2 tank works. And what does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it.

On the other hand, it's probably the "right" answer (with the wrong reasons given) if you are an employee of Airgas. Without someone who WILL NOT fill your tank if it's out of hydro, you could just merrily refill your small tank long past the date it should be re-hydro tested at. And that could be bad. Very Bad.

Not that I'm planning on a keg setup, but do any of you convert CO2 fire extinguishers as your gas bottles? Seems like it would work fine, and might be cheaper at certain phases of the market.<edit> - then again, probably all the threads are different and nothing matches up. Nevermind </edit>

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Old 09-17-2008, 02:17 AM   #20
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Just a thought and not sure if it would work, but I've seen people move gasses/liquids from tank to tank by warming one and chilling the other. You may not even have to invert a larger tank if this would work. Just keep the 5lb er in an ice water bucket and let things run their course.

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