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Old 08-21-2012, 01:10 PM   #1
Matasata
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Join Date: Nov 2011
Location: Gallipolis, OH
Posts: 16
Default Missed pre-boil volume Decoction mash

I use beersmith to set up my first decoction mash. Everything went pretty well except I missed my pre-boil volume by 3 gal. I normally have about 13 gal but ended up with only 10. I used water to top off and hit 75% efficiency. That was ok, but I wonder what went wrong. Also, I would imagine I could hit a higher efficiency if I had the proper amounts of sparge water.

Basically if I use beersmith for a decoction mash I want to be able to trust it.

here is the recipe:

Recipe: The Dunkel Experment
Brewer: Mark Thompson
Asst Brewer:
Style: Dunkelweizen
TYPE: All Grain
Taste: (30.0)

Recipe Specifications
--------------------------
Boil Size: 13.14 gal
Post Boil Volume: 11.44 gal
Batch Size (fermenter): 10.00 gal
Bottling Volume: 9.25 gal
Estimated OG: 1.052 SG
Estimated Color: 16.6 SRM
Estimated IBU: 16.3 IBUs
Brewhouse Efficiency: 72.00 %
Est Mash Efficiency: 79.2 %
Boil Time: 90 Minutes

Ingredients:
------------
Amt Name Type # %/IBU
10 lbs Wheat - Red Malt (Briess) (2.3 SRM) Grain 1 51.1 %
9 lbs Pale Ale Malt 2-Row (Briess) (3.5 SRM) Grain 2 46.0 %
9.1 oz Belgian Debittered Black Malt (550.0 SRM Grain 3 2.9 %
2.00 oz Hallertauer [3.80 %] - First Wort 90.0 m Hop 4 16.3 IBUs
2.0 pkg Munuch (Lallemand #- ) [50.28 ml] Yeast 5 -


Mash Schedule: Decoction Mash, Single
Total Grain Weight: 19 lbs 9.1 oz
----------------------------
Name Description Step Temperat Step Time
Protein Rest Add 33.10 qt of water at 129.3 F 122.0 F 35 min
Saccharification Decoct 14.44 qt of mash and boil it 154.0 F 45 min
Mash Out Decoct 9.80 qt of mash and boil it 168.0 F 10 min

Sparge: Fly sparge with 8.01 gal water at 168.0 F

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