Home Brew Forums > Home Brewing Beer > General Techniques > 2 Gallons in 5 Gallon Carboy
Reply
 
Thread Tools
Old 09-10-2008, 02:03 PM   #1
hal simmons
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2007
Posts: 104
Liked 1 Times on 1 Posts

Default 2 Gallons in 5 Gallon Carboy

I've recently started brewing some two-gallon test batches to try out some new recipes before making a larger batch. I've been fermenting them in a 5 gallon carboy since it's the smallest i've got. Should I be worried about all the headspace? Should I be careful about how long I leave these batches in primary/secondary with that amount of headspace? I haven't actually bottled any of these small batches yet, but i've got two batches in carboys right now. Just wondering if I should invest in a couple 3 gallon carboys or not.


hal simmons is offline
 
Reply With Quote
Old 09-10-2008, 02:12 PM   #2
bsay
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2008
Location: Fort Collins
Posts: 574
Liked 3 Times on 3 Posts
Likes Given: 1

Default

For primary fermentation, you'll be fine as the headspace will fill up quickly with CO2. When transferring to a secondary, if there is any way you can purge the container with CO2 first, I recommend doing just that. No worries though, I'm sure it will be fine either way.

You could look into getting some 3 gal Better Bottles if you plan to brew 2 gallon batches often.


__________________
Check out my Homebrewery Virtual Tour!

Who says you can't brew all-grain indoors?
Brewing 2.5 gal batches with a 2gal cooler MLT in my cramped apartment. Pictures coming soon!

Ask me about my Keezer/2.5 gal brew setup!
bsay is offline
 
Reply With Quote
Old 09-10-2008, 02:41 PM   #3
homebrewer_99
Feedback Score: 0 reviews
 
homebrewer_99's Avatar
Recipes 
 
Join Date: Feb 2005
Location: Atkinson (near the Quad Cities), IL
Posts: 17,949
Liked 116 Times on 91 Posts
Likes Given: 1

Default

I agree. The CO2 outgassing will push all air out of the carboy while fermenting
__________________
HB Bill
homebrewer_99 is offline
 
Reply With Quote
Old 09-10-2008, 02:45 PM   #4
hal simmons
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2007
Posts: 104
Liked 1 Times on 1 Posts

Default

So basically as long as I don't transfer to secondary, i'll be OK? I wasn't planning on using a secondary for any of these batches, but some of them might stay in primary for a month or so.
hal simmons is offline
C-Rider Likes This 
Reply With Quote
Old 09-10-2008, 04:35 PM   #5
homebrewer_99
Feedback Score: 0 reviews
 
homebrewer_99's Avatar
Recipes 
 
Join Date: Feb 2005
Location: Atkinson (near the Quad Cities), IL
Posts: 17,949
Liked 116 Times on 91 Posts
Likes Given: 1

Default

You could leave it in a primary for a month without any problems, but you can still use a secondary because there will still be some outgassing.

I ferment on the floor and rack from a counter top.

If you place your carboy at the location (height) you will be racking from you will eliminate any jostling (and rousing) of the fallen yeast which will keep the brew clear thus working to your advantage.
__________________
HB Bill
homebrewer_99 is offline
 
Reply With Quote
Old 08-28-2013, 01:15 AM   #6
week0019
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2013
Posts: 32
Default

Quote:
Originally Posted by bsay View Post
For primary fermentation, you'll be fine as the headspace will fill up quickly with CO2.
Would this be true for lagers too as I believe they don't ferment as rapidly as ales?
week0019 is offline
 
Reply With Quote
Old 08-28-2013, 01:21 AM   #7
ACbrewer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Fredericksburg, VA
Posts: 1,623
Liked 105 Times on 95 Posts
Likes Given: 3

Default

Quote:
Originally Posted by week0019 View Post
Would this be true for lagers too as I believe they don't ferment as rapidly as ales?
pretty much. A standard gravity beer (around 1.040) will produce about 60 gallons of co2 for every gallon of beer. How fast? I don't know, All the O2 won't be displaced, some of it will end up in the fermentation, but remember unless you are using O2, just about every beer is under aerated at the start.

Long and short, I'd not worry about it.
ACbrewer is offline
 
Reply With Quote
Old 08-28-2013, 10:32 AM   #8
RM-MN
HBT_SUPPORTER.png
Feedback Score: 1 reviews
Recipes 
 
Join Date: Nov 2010
Location: Solway, MN
Posts: 8,206
Liked 1158 Times on 941 Posts
Likes Given: 605

Default

Quote:
Originally Posted by week0019 View Post
Would this be true for lagers too as I believe they don't ferment as rapidly as ales?
You don't really care because as soon as a little CO2 is produced it, being heavier than air, will form a blanket over the beer and then as time goes on, will push out the rest of the remaining air.
RM-MN is offline
StatenIslandGeek Likes This 
Reply With Quote
Old 08-30-2013, 11:26 AM   #9
week0019
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2013
Posts: 32
Default

Thanks for all the responses!
week0019 is offline
 
Reply With Quote
Old 09-02-2013, 06:48 PM   #10
C-Rider
Senior Member
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
C-Rider's Avatar
Recipes 
 
Join Date: Feb 2011
Location: Wai, Hawaii
Posts: 3,064
Liked 227 Times on 184 Posts
Likes Given: 584

Default

Try boiling down to just under 2 gallons and get a 2 gallon paint bucket from HD. That is what I use. Although nothing wrong w/your 5 gallon primary.


__________________
Kaiser Ridge Brewing
-------------------------
Lagering: Schwarzbier (lager)
Bottle Conditioning: Düsseldorf Altbier
Bottle Conditioning: SN Celebration Clone
Bottled in the refer: Dunkelweizen
Bottled in the refer: Choc/Coffee Stout
Bottled in the refer: German IPA
Bottled in the refer: Am. Pale Ale(3/28)
Bottled in the refer: Am Imperial Stout(3/11)
Bottled in the refer: GermanImperialStout
C-Rider is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
2.5 Gallons batch in 3 gallon carboy? HalloweenGod General Techniques 5 08-22-2013 10:05 AM
5 Gallons in 6.5 Gallon Carboy Morkin Beginners Beer Brewing Forum 12 09-01-2009 03:37 PM
7 gallon carboy for 5 gallons batches... SowegaBrews General Techniques 5 03-23-2009 04:03 PM
~4.25 gallons in my 5 gallon carboy. Too much headspace? Tankard Beginners Beer Brewing Forum 4 04-17-2008 01:19 AM
Anyone got a picture of a 6.5 gallon carboy with 5 gallons in it? Tankard Beginners Beer Brewing Forum 24 04-12-2008 06:54 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS