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Home Brew Forums > Home Brewing Beer > Bottling/Kegging > How long does a 5 lb tank of CO2 last in your kegorator?
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Old 01-07-2007, 01:19 AM   #1
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Default How long does a 5 lb tank of CO2 last in your kegorator?

I have a 2.5 lb, a 5 lb CO2 canister. I also have a 20 lb canister I keep in the walkin cooler... The kegerator I'm starting on will have two 5 gallon kegs.

I just dry ran it all and the 2.5 lb canister fits so much easier than the 5 lb canister. So my question is - how long should I expect the 2.5 lb and the 5 lb canisters to last?

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Old 01-07-2007, 01:36 AM   #2
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A long time. Exactly how long I'm not sure. I've had the same un-refilled 20 lb cylinder since almost a year ago, and it's still at 800 lbs. I've force carbonated several batches of beer, dispensed two half barrels, and ten 5 gallon cornies.

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Old 01-07-2007, 01:40 AM   #3
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thats good news... with all that talk about your psi going down in the fridge, i thought i would be running out of co2 faster than my beer!

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Old 01-07-2007, 02:00 AM   #4
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Quote:
Originally Posted by aekdbbop
thats good news... with all that talk about your psi going down in the fridge, i thought i would be running out of co2 faster than my beer!
I keep my tank outside the fridge, but I wouldn't be concerned were I to keep it inside the fridge. Realize that the tank pressure will be significantly lower in the fridge, but the volume is still the same.
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Old 01-07-2007, 02:40 AM   #5
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I have six corny's in a 7cf chest freezer with a 5lb cylinder attached I've forced 3 corny's full and it been 4 months and counting ?

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Old 01-07-2007, 02:48 AM   #6
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yeah i don't get that whole thing with the pressure. As long as it's still fueling my taps, I am happy... haha

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Old 01-07-2007, 02:52 AM   #7
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Quote:
Originally Posted by aekdbbop
yeah i don't get that whole thing with the pressure. As long as it's still fueling my taps, I am happy... haha
Eh, you don't have to understand. The point is, it will last through almost exactly the same number of kegs, whether it's inside or outside the fridge.

Also, if you have a high side pressure gauge (one that reads tank pressure, not outlet pressure), don't be alarmed when it appears low if you keep the tank in the fridge.
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Old 01-07-2007, 02:58 AM   #8
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Thanks for the replies... I was considering going with the 2.5 lb tank since its so much smaller but I think I'll just keep that as my backup tank.

I just got finished doing some "modifications" to the fridge's insides that opened up a lot more room - so there doesn't seem like there is going to be any problem fitting the 5 lb tank.

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Old 01-07-2007, 06:26 AM   #9
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remember, co2 is stored as a liqud, that's why the pressure will remain constant till the very end of the tank. pressure is directly related to temperature, so if the tank is in the fridge, it will show around 500 psi or so, i think.

remember, always check for leaks. if you have a small tank, even a minor leak will drain the tank in no time.

i am a big proponent of using the largest tank you can. it is just the most economical. the charge for a swap of a 5 lb tank compared to a 20 lb or even a 50 lb tank isn't that different, but the larger tanks will last you significantly longer.

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Old 01-07-2007, 02:47 PM   #10
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Quote:
Originally Posted by gnef
the charge for a swap of a 5 lb tank compared to a 20 lb
What does this mean, cost of filling, cost difference between one tank and the other or something else? Sorry, I'm new on the kegging scene.
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