How much CO2 for Sankey? - Home Brew Forums
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Old 03-17-2009, 06:02 PM   #1
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Mar 2007
Arlington Heights, IL
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Friend is getting a keggerator fridge and wants to know how big of a tank he "needs".
He plans on running 1 or 2, 1/4 barrels of commercial brew off of a tank.

I know 5lbs will last a while with cornies, but I don't know if the 1/4 or 1/2 barrels are proportional.


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Old 03-17-2009, 07:09 PM   #2
May 2007
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I'd get as big a tank as there is room for. Refilling big tanks is much cheaper than little place charges $10 for a 5lb, and I believe $13 for a 10lb.

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Old 03-17-2009, 07:41 PM   #3
Jan 2008
Maryland, USA
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Commercial kegs take less CO2 than homebrew because they're already carbed. If you force-carb your kegged beer, you'll only get somewhere around 5-10 kegs out of a 5lb. tank depending on how heavily you carb it. But, if you use priming sugar in the keg and just use CO2 to adjust the pressure and dispense, it'll last a lot longer.

Pint for pint, you'll use the same ammount of CO2 to dispense commercial as you will for carbonated homebrew.

1/4 "ponies" are 7.75 gallons and a 1/2 bbl is 15.5 gal. Corny kegs are 5 gallons. So if you can push 25 kegs of homebrew with a 5lb. tank, you can push 16 pony kegs of commercial with the same ammount.

But I agree, get the largest tank you have space for. I've got a 20lb. for general use and a 5lb. for portable needs.

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Old 03-17-2009, 07:53 PM   #4
Jul 2007
Rochester, MN
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In college I had a 20# co2 tank for a sanke kegerator and we went thru a keg atleast every month and the co2 tank lasted 2 years.

But the co2 tank had a big property of coke sticker on it, so I couldn't get it refilled, so I got a 5# tank and that lasted almost a year, so probably 10+ kegs on a 5# tank.
On tap: BCB Porter, $12 Cream ale, Amarillo Pale Ale, Simcoe Pale Ale
Kegged: Amarillo Pale Ale, Simcoe Pale Ale, $12 Cream ale
Primary: Calypso Pale Ale (x2)
On Deck: Lake Walk Pale Ale, BCB IPA

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Old 03-17-2009, 08:32 PM   #5
Oct 2007
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I remember being able to push the contents of about 5 to 8 kegs on a 5lb tank between refills. The number of kegs was highly dependent on how much time went between drinking each one. That being said, tanks on commercial kegs last a long time as everything is pre-carbed, but you should still go with the biggest tank possible so you don't have to keep running out to get more.
No matter how rich you are, you can still only drink 16 or 17 liters of beer a day.

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