Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > 5-6 Gallon batches in a 5 Gallon MLT
Reply
 
Thread Tools
Old 06-21-2011, 08:44 PM   #1
ThinMan
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2011
Location: Lascassas, Tennessee
Posts: 39
Liked 2 Times on 1 Posts

Default 5-6 Gallon batches in a 5 Gallon MLT

I am new to brewing but with the help of my brew club I switched to All Grain after my first batch. I have done 7 batches now and am generally pleased with my results. I am confused on one topic though:

I have a 5 gallon Igloo Cylinder MLT and I regularly use it to make 5-6 gallon batches. I have read on these forums that this does not work well and that you cannot get OG's higher than 1.055 or so. I understand that I can only fit so much grain and water in a 5 gallon container, but I made the AHA Big Brew "Positively Porter" and hit over 1.070 OG on a 5.5 gallon batch.I think there were over 13 lbs of grain in that recipe. I do this by batch sparging multiple times until I hit my pre boil volume. The beer turned out excellent.

I know that it would be best for me to move up to a 10 Gallon MLT, but could someone point out what is wrong with what I am doing now?


ThinMan is offline
 
Reply With Quote
Old 06-21-2011, 09:30 PM   #2
Nateo
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2010
Location: Bennett Springs, MO
Posts: 2,055
Liked 39 Times on 30 Posts
Likes Given: 35

Default

http://www.rackers.org/calcs.shtml

Scroll down to the "Can I mash it" calculator. I wouldn't go much under 1qt/lbs, but according to the calculator you could mash close to 15lbs of grain. Even with modest efficiency, that'd give you about 1.080 OG.

As long as your batch sparges don't drop below 1.010 what you're doing should be fine. Below 1.010 and the risk of extracting off-flavors increases.


__________________
To paraphrase Dr. England - "Off-flavors smooth with time. So do mountains. Brew it right from the start!"

My blogsite: http://nateobrew.blogspot.com/
Nateo is offline
 
Reply With Quote
Old 06-21-2011, 09:55 PM   #3
Revvy
Post Hoc Ergo Propter Hoc
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Revvy's Avatar
Recipes 
 
Join Date: Dec 2007
Location: "Detroitish" Michigan
Posts: 40,817
Liked 2890 Times on 1703 Posts
Likes Given: 3520

Default

I've been using my 5 gallon cooler for 5 years now, with no problems. And most of my beers are between 1.070 and 1.080. On the rare times I want to brew a larger beer, I usually just borrow a larger mash tun from one of my brewer brothers I've met through here.
__________________
Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.

Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman

I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew
Revvy is offline
 
Reply With Quote
Old 06-21-2011, 10:31 PM   #4
_JP_
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2011
Location: Woodstock, GA
Posts: 311
Liked 5 Times on 5 Posts

Default

I just converted a spare 60-qt cooler for batch sparging "big" beers with the same fears you had, but after my last brew day, I'm pretty happy with my efficiency from my 5-gal Igloo. I fit 13lbs in there with room to spare.

I got 88% efficiency that day. Fly sparged, and hit my temps perfectly. If I could match that same efficiency (probably not), from 14lbs of grain, that'd give me a 1.099 beer, and I don't plan on making anything bigger than that.

That was the highest efficiency I've ever gotten by the way. Temps are everything.
__________________
Working on:
summer gardening

Upcoming projects:
NG line for outdoor burner
_JP_ is offline
 
Reply With Quote
Old 06-22-2011, 10:29 PM   #5
jaginger
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2009
Location: Hartford, CT
Posts: 484
Liked 3 Times on 3 Posts
Likes Given: 1

Default

Quote:
Originally Posted by _JP_ View Post
That was the highest efficiency I've ever gotten by the way. Temps are everything.
That's fantastic. But temps are just temps, right? You're going to get full conversion anywhere between 148 and 158 as long as you mash long enough. So i'm not sure that hitting temps exactly contributed to high efficiency. But it probably made an awesome beer.
jaginger is offline
 
Reply With Quote
Old 06-23-2011, 01:04 AM   #6
_JP_
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2011
Location: Woodstock, GA
Posts: 311
Liked 5 Times on 5 Posts

Default

Quote:
Originally Posted by jaginger View Post
That's fantastic. But temps are just temps, right? You're going to get full conversion anywhere between 148 and 158 as long as you mash long enough. So i'm not sure that hitting temps exactly contributed to high efficiency. But it probably made an awesome beer.
yes, you're right about the 148-158 range.

I've read numerous posts here lately where folks are shooting for 148, and their thermometer reads 10 deg high, so their efficiency plummets because they mashed at 138 (or visa-versa they mashed way too hot with a low reading thermometer). Either way, I just wanted to call attention that an accurate thermometer's necessary, along with stirring every once in a while to make sure things are evened out in there.

As for the "awesome beer".... It's still in the primary (2.5 weeks now) and just got down to 1.024. Still a little high, but that's close to the attenuation of the yeast (US-05), especially since I mashed on the high side (154). Probably keg it this weekend and call it done.
__________________
Working on:
summer gardening

Upcoming projects:
NG line for outdoor burner
_JP_ is offline
 
Reply With Quote
Old 06-23-2011, 01:57 AM   #7
shelly_belly
Power To Love
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
shelly_belly's Avatar
Recipes 
 
Join Date: Jul 2009
Location: Rabbittown, Bama
Posts: 1,585
Liked 156 Times on 123 Posts
Likes Given: 31

Default

My 5 gal round has been awesome as a 1st mash tun. 30+ brews in 2 years so far and mine was used when I was given it. The most I've done is 14# of grain at .9qts/lb ratio. I'll be getting a 10 gal soon though. Not to make bigger beers, just bigger batches!

The only thing I see you doing wrong is... Rubbermaid > Igloo


shelly_belly is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
5, or 10 gallon rubbermaid circular for 5 gallon batches becksbolero2 All Grain & Partial Mash Brewing 19 08-26-2009 03:27 AM
10 gallon batches... 8 gallon kettle?! WorryWort All Grain & Partial Mash Brewing 13 12-08-2008 12:00 AM
Anyone ever do 15 gallon batches? EdWort All Grain & Partial Mash Brewing 15 09-05-2008 08:32 PM
10 gallon batches Jayfro21 All Grain & Partial Mash Brewing 13 11-14-2007 12:59 PM
10 Gallon Batches @#$()* mward All Grain & Partial Mash Brewing 12 07-03-2007 06:00 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS