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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Stuck Mash problem
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Old 02-12-2012, 11:44 PM   #1
Landocota
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Default Stuck Mash problem

Just tried my first AG batch using a NB 5 gallon cooler system. Everything was going great till I tried to lauter and nothing came out. The system has a false bottom and I tested everything before I started my (attempted )brew day. The grain bill was about 10.5 lbs. What could be causing this?

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Old 02-13-2012, 04:06 AM   #2
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What were you brewing (recipe).

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Old 02-13-2012, 04:21 AM   #3
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It was 9 lb 2 row pale, 1 lb crystal 40l, .5lb crystal 90l, and 2 oz roasted barley. Trying to do an aggressively hopped red.

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Old 02-13-2012, 04:47 AM   #4
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i had a similar problem.

try using 0.5 lbs of rice hulls in every batch you brew. i know, i know, "you don't need them unless you use wheat or rye", but trust me, it'll increase your efficiency and flow rate no matter the grain bill.

hope this helps!

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Old 02-13-2012, 05:07 AM   #5
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How fast are you collecting your runnings? Don't turn the ball valve all the way open. The grain bed can become compacted if you do this. Collecting your wort with a slower runoff will help the grain bed form properly and not turn into concrete.

You shouldn't have any issues with a grain bill like that. I suggest pinpointing the problem instead of using hulls in every batch. You're going to run into problems here and there, but finding out why they occur and fixing them will help you better understand your system and, ultimately, achieve better results.

*edit* Also, don't be afraid to stir your mash pre lautering. Letting it sit or running off your wort slowly will actually help you form a grain bed after stirring.

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Old 02-13-2012, 05:11 AM   #6
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Quote:
Originally Posted by SethMasterFlex View Post
How fast are you collecting your runnings? Don't turn the ball valve all the way open. The grain bed can become compacted if you do this. Collecting your wort with a slower runoff will help the grain bed form properly and not turn into concrete.

You shouldn't have any issues with a grain bill like that. I suggest pinpointing the problem instead of using hulls in every batch. You're going to run into problems here and there, but finding out why they occur and fixing them will help you better understand your system and, ultimately, achieve better results.

*edit* Also, don't be afraid to stir your mash pre lautering. Letting it sit or running off your wort slowly will actually help you form a grain bed after stirring.
+1 all sound info.
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Old 02-13-2012, 05:13 AM   #7
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Quote:
Originally Posted by SethMasterFlex
How fast are you collecting your runnings? Don't turn the ball valve all the way open. The grain bed can become compacted if you do this. Collecting your wort with a slower runoff will help the grain bed form properly and not turn into concrete.

You shouldn't have any issues with a grain bill like that. I suggest pinpointing the problem instead of using hulls in every batch. You're going to run into problems here and there, but finding out why they occur and fixing them will help you better understand your system and, ultimately, achieve better results.
I only opened the valve about 1/2 way, once nothing came out I opened it all the way. Is it possible the grain was milled too fine?
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Old 02-13-2012, 05:19 AM   #8
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How is your false bottom connected to your valve? Are you sure you didn't knock something loose while stirring? Mine used to be connected with a tube. It was easy to dislodge while stirring and caused a few incidents.

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Old 02-13-2012, 05:22 AM   #9
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How much water did you use in your mash?

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Old 02-13-2012, 05:23 AM   #10
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How much water did you use in your mash?
I went with 1.5 qt/lb so it was about 15.75 quarts.
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