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General Category => All Grain Brewing => Topic started by: Jimc on March 03, 2016, 06:39:17 PM

Title: Mash tun for 5 gal
Post by: Jimc on March 03, 2016, 06:39:17 PM
Hey all I have a question about my mash tun I have been brewing 10 gal batches
I have a 70qt Coleman extreme cooler with a braided hose it does well for my 10 gal
Batches but this weekend I would like to brew 2 five gal batches of
Different beers . So is my 70 qt cooler too big for 5 gal batches I'm just
Wondering if will hold the mash temp with extra head space
Title: Re: Mash tun for 5 gal
Post by: stpug on March 03, 2016, 06:44:12 PM
Theoretically it should work fine. You will want to account for potential heat loss during the mash (if it matters to you), and prepare for a different efficiency than typical (maybe a little, maybe more).  It should work; this weekend should indicate to you what kind of changes you need to make for 5 gallon batches on your system.  I'd say, brew the first; crunch the numbers; adjust for the second and see how well you've done accounting for the variations.
Title: Re: Mash tun for 5 gal
Post by: 69franx on March 03, 2016, 06:47:30 PM
I guess the standard answer I have seen and asked on here is that it will work, and is what i use for my 5-6 gallon batches, but is not ideal. Smaller is better, the bigger tun needs to be monitored and planned for after seeing what happens. for a normalish beer of around 16# grain and 1.5-1.75qt/#, i usually use less than 10 gallons of space in this cooler, but I know what it does and plan accordingly. I mashed my IPA in it back in at end of January, and went from 149.5°F down to around 147°F in 90 minutes, so I have no issues with that type of batch. It was a slightly higher drop with a 10# grain bill for my pilsner or saison, but most conversion happens early, so noticeable effect to my rookie taster senses. And everything stpug has to say as I write this
Title: Re: Mash tun for 5 gal
Post by: denny on March 03, 2016, 06:52:33 PM
I use a 70 qt. cooler for 5 gal. batches all the time and there is no problem holding heat.  I guess if you used it in an extremely cold environment, that might be different.
Title: Re: Mash tun for 5 gal
Post by: theDarkSide on March 03, 2016, 06:56:36 PM
I only do 5 gallons batches and use the 70 qt coleman.  The only time I think it was a problem (and even then it wasn't ) was when I did a mild and the grain bill was tiny.
Title: Re: Mash tun for 5 gal
Post by: HoosierBrew on March 03, 2016, 06:58:24 PM
Another 5 gallon in a 70qt Extreme here. No issues for me.
Title: Re: Mash tun for 5 gal
Post by: Stevie on March 03, 2016, 07:08:25 PM
I like having two mashtuns. One for less than 22lbs of grain and one for over 22lbs of grain. I mashed a 5 gallon 1.040 beer (8lbs) in my 70qt once and I had issues getting a good filter after vorlauf.

I've considered getting an even smaller 5 gallon tun for small bathes and small grain bills, but that's low priority.
Title: Re: Mash tun for 5 gal
Post by: Jimc on March 03, 2016, 07:10:53 PM
Ok sounds good to me guys I brew in my garage no worries
About cold temp thanks
Title: Re: Mash tun for 5 gal
Post by: denny on March 03, 2016, 08:03:45 PM
I like having two mashtuns. One for less than 22lbs of grain and one for over 22lbs of grain. I mashed a 5 gallon 1.040 beer (8lbs) in my 70qt once and I had issues getting a good filter after vorlauf.

I've considered getting an even smaller 5 gallon tun for small bathes and small grain bills, but that's low priority.

It is handy having a variety.  I have 48, 70, and 152 qt. tuns.