Newbie Question - Is there an issue with using 5 gallon Keg for 2 gallon batch - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Bottling/Kegging > Newbie Question - Is there an issue with using 5 gallon Keg for 2 gallon batch

Thread Tools
Old 10-01-2012, 03:42 PM   #1
Nov 2009
Salem, CT
Posts: 11

I just upgraded to kegs from bottles which has been great. I am trying out a weird new recipe and only want to make 2-3 gallons of it in case it is not great. is there a problem with having a few gallons of "headspace' in the 5 gallon keg to start with?

Please let me know if there are issues and if there is any way to mitigate them. Your help is always appreciated.

Reply With Quote
Old 10-01-2012, 03:58 PM   #2
BigB's Avatar
Dec 2009
Shelby Twp, MI
Posts: 1,755
Liked 47 Times on 41 Posts

No, you will be fine...assuming you are force carbing the beer. The surface area of the beer will be the same at 2 gallons as it would be with 5 gallons. But since the depth of the beer will be less, it will likely carbonate a bit quicker. Also, do yourself a favor and make sure you purge well to get the oxygen out.
I love the sound of an airlock bubbling in the morning. It sounds like.....VICTORY.

Originally Posted by TxBrew
It's now degenerating into nu uh and uh huhs and it no longer serves a point.

Reply With Quote
Old 10-01-2012, 04:05 PM   #3
BBL_Brewer's Avatar
Feb 2011
Kokomo, IN
Posts: 3,702
Liked 440 Times on 303 Posts

I wouldn't do this often because it will waste CO2 vs filling the keg. That's a lot of headspace to purge. Other than that, there is no issue.
Slots Down Brewery
Stick with the plan....not the sparge.

Never Ending Liquid Yeast - How to Farm Yeast and Freeze it.

Reply With Quote
Old 10-01-2012, 04:41 PM   #4
SweetSounds's Avatar
Jan 2010
Des Moines, Iowa
Posts: 1,425
Liked 21 Times on 20 Posts

While it is true you'll "waste" more Co2 in the headspace with only 2 gallons in the keg, it's a non-issue.

It will likely carb faster, and you will have to purge more to get the o2 out. However, the "Wasted" gas in the headspace is no different than a full keg.

When a full keg kicks, you have still "Wasted" the Co2 in the now empty headspace.

You're good. There's really nothing to worry about.

It could be argued that you'd be better off with 3 gallon kegs for short batches. But, you can buy a LOT of Co2 for the $75 price difference in kegs.
Originally Posted by Ecnerwal View Post
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...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
3 gallon batch in a 5 gallon keg? Tam004 Bottling/Kegging 4 11-17-2011 08:08 AM
priming sugar amount for a 2.5 gallon batch in a 5 gallon keg killian Bottling/Kegging 5 10-14-2011 04:20 PM
5 gallon batch split between two 5 gallon cornies? CanadianQuaffer Bottling/Kegging 3 09-12-2011 02:41 AM
5 Gallon Batch in 10 Gallon Keg gpatkinson Bottling/Kegging 3 06-30-2011 02:31 PM
kegging 5 gallon batch to a 1/2 bbl keg Jaellis Bottling/Kegging 7 05-30-2011 01:52 AM

Forum Jump