All Grain OG and Volume a little low... - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > All Grain OG and Volume a little low...

Reply
 
Thread Tools
Old 03-23-2008, 02:18 PM   #1
Stevorino
Recipes 
 
Feb 2008
Alpharetta, GA
Posts: 938
Liked 2 Times on 2 Posts



My keggle spigot got clogged by hop leaves at the end (any good suggestions?) and left about a gallon to a gallon and a half of a very hoppy chilled wort in the keggle. I think I ended up getting 4.5 gallons.

I took an OG reading from the remaining hoppy chilled wort I couldn't get into the fermenter and came up short at 1.041 (shooting for 1.049-1.051). What could I have done wrong to come up short (again) on volume and OG?


(11 lbs of grain-- 5 gallons of water in mash, added another 4.5 in second batch sparge-- had 7.5 in boil. Approximately 1 gallon evaporated and 1.5-2 gallons stuck in bottom that I couldn't get from stuck spigot-- total 4.5-5)
__________________
-Stevorino-_________________________________________
In Keezer:
1. BCS - Wet Hopped West Coast Blaster
2. CYBI - Gordon's IPA Clone
3. BCS - Scottish -80
4. BCS - Specialty Saison (Gold Medal at BMO)
In Process:
1. BCS - Janet's Brown Ale (Fermenting)

 
Reply With Quote
Old 03-23-2008, 03:52 PM   #2
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 23,201
Liked 1658 Times on 1071 Posts


Wait. 5 gallons in the mash is like 1.8 quarts per pound which is a little high for my tastes. It leaves very little for the sparge. Lean towards 1.25 instead, which would have been more like 3.5 gallons in the mash.

When you say 4.5 in second batch sparge, I think you mean you sparged once with 4.5 gallons. It's on the second batch sparge if you didn't already drain twice.

Just to baseline some terminology....
My first runnings come right from the mash.
Then I infuse a first batch sparge and drain that (second runnings).
Then I infuse a second batch sparge and drain (3rd runnings).

It sounds like you might have added some water to the mash prior to running off anything. This is a "mash out", not technically a sparge yet.

In any case, I recommend 3 discrete runnings.

On the stuck drain in the kettle, you'll either want to install a screen on the drain, something similar to the hop stopper or you'll want to use hop bags. All that wort left in there takes away from your brewhouse efficiency.
__________________
Welcome to BrewHardware.com. I love you.
BIAB Large Mesh False Bottoms and SS HERMS COILS are IN!!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

 
Reply With Quote
Old 03-23-2008, 03:55 PM   #3
Stevorino
Recipes 
 
Feb 2008
Alpharetta, GA
Posts: 938
Liked 2 Times on 2 Posts


Quote:
Originally Posted by Bobby_M
Wait. 5 gallons in the mash is like 1.8 quarts per pound which is a little high for my tastes. It leaves very little for the sparge. Lean towards 1.25 instead, which would have been more like 3.5 gallons in the mash.

When you say 4.5 in second batch sparge, I think you mean you sparged once with 4.5 gallons. It's on the second batch sparge if you didn't already drain twice.

Just to baseline some terminology....
My first runnings come right from the mash.
Then I infuse a first batch sparge and drain that (second runnings).
Then I infuse a second batch sparge and drain (3rd runnings).

It sounds like you might have added some water to the mash prior to running off anything. This is a "mash out", not technically a sparge yet.

In any case, I recommend 3 discrete runnings.

On the stuck drain in the kettle, you'll either want to install a screen on the drain, something similar to the hop stopper or you'll want to use hop bags. All that wort left in there takes away from your brewhouse efficiency.
Bobby, you're my hero.

To clarify, I had 5 gallons worth of first runnings, then I added 4.5 gallons at 150 degrees for second runnings. Never did a third. Will do next time.

Yeah, I need to get some kind of screen-- that sounds fairly necessary.

Any ideas on the OG being so low?
__________________
-Stevorino-_________________________________________
In Keezer:
1. BCS - Wet Hopped West Coast Blaster
2. CYBI - Gordon's IPA Clone
3. BCS - Scottish -80
4. BCS - Specialty Saison (Gold Medal at BMO)
In Process:
1. BCS - Janet's Brown Ale (Fermenting)

 
Reply With Quote
Old 03-23-2008, 04:18 PM   #4
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 23,201
Liked 1658 Times on 1071 Posts


Yeah, the low OG was just having really low efficiency. I think it's because of your really high volume of mash water. In order to get 5 gallons of first runnings, you must have infused a total of about 7 gallons prior to first runnings. That's a lot.

Let's suppose you doughed in your 11 pounds of grain with only 3.5 gallons.
At the end of the 60minute mash, vorlauf and drain. Given that grain usually absorbs about .1 gallons per pound, I'd expect you to get out only 2.4 gallons on first runnings.

If you want 7.5 gallons in the kettle, that means you need to sparge about 5 gallons (7.5 - 2.4 = 5.1 gallons).

In order to maximize efficiency (in my experience), break that 5.1 gallons into two 2.5 gallon batches at about 180F.

You'll easily meet your OGs next time, if not overshoot them. In order to troubleshoot the process, I recommend taking gravity readings of each running. The last running should be 1.020 or lower. If it's higher, the process can use tweaking.
__________________
Welcome to BrewHardware.com. I love you.
BIAB Large Mesh False Bottoms and SS HERMS COILS are IN!!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

 
Reply With Quote
Old 03-23-2008, 06:23 PM   #5
Stevorino
Recipes 
 
Feb 2008
Alpharetta, GA
Posts: 938
Liked 2 Times on 2 Posts


That sounds good-- Is there anything I can/should do to this brew or do you think it'll turn out okay w/ the low OG?
__________________
-Stevorino-_________________________________________
In Keezer:
1. BCS - Wet Hopped West Coast Blaster
2. CYBI - Gordon's IPA Clone
3. BCS - Scottish -80
4. BCS - Specialty Saison (Gold Medal at BMO)
In Process:
1. BCS - Janet's Brown Ale (Fermenting)

 
Reply With Quote
Old 03-23-2008, 08:05 PM   #6
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
 
ajf's Avatar
Recipes 
 
Oct 2005
Long Island
Posts: 4,646
Liked 105 Times on 99 Posts


Quote:
Originally Posted by Stevorino
Bobby, you're my hero.

To clarify, I had 5 gallons worth of first runnings, then I added 4.5 gallons at 150 degrees for second runnings. Never did a third. Will do next time.

Yeah, I need to get some kind of screen-- that sounds fairly necessary.

Any ideas on the OG being so low?
For the second runnings, you need to heat the sparge water to at least 170. (After mixing with the grain, you want the water to stabilize at about 165 - 170.) Low temps will contribute to low OG.

-a.

 
Reply With Quote
Old 03-23-2008, 08:09 PM   #7
Stevorino
Recipes 
 
Feb 2008
Alpharetta, GA
Posts: 938
Liked 2 Times on 2 Posts


Quote:
Originally Posted by ajf
For the second runnings, you need to heat the sparge water to at least 170. (After mixing with the grain, you want the water to stabilize at about 165 - 170.) Low temps will contribute to low OG.

-a.
That's what I remember being told and reading-- why does Clonebrews suggest you sparge at 150?
__________________
-Stevorino-_________________________________________
In Keezer:
1. BCS - Wet Hopped West Coast Blaster
2. CYBI - Gordon's IPA Clone
3. BCS - Scottish -80
4. BCS - Specialty Saison (Gold Medal at BMO)
In Process:
1. BCS - Janet's Brown Ale (Fermenting)

 
Reply With Quote
Old 03-23-2008, 08:17 PM   #8
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
 
ajf's Avatar
Recipes 
 
Oct 2005
Long Island
Posts: 4,646
Liked 105 Times on 99 Posts


Quote:
Originally Posted by Stevorino
That's what I remember being told and reading-- why does Clonebrews suggest you sparge at 150?
Probably a typo

-a.

 
Reply With Quote
Old 03-23-2008, 08:25 PM   #9
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 23,201
Liked 1658 Times on 1071 Posts


No kidding. Wow, if you sparged with 150f water, you can easily pickup 10% efficiency with 180F water.
__________________
Welcome to BrewHardware.com. I love you.
BIAB Large Mesh False Bottoms and SS HERMS COILS are IN!!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

 
Reply With Quote
Old 03-23-2008, 09:14 PM   #10
Stevorino
Recipes 
 
Feb 2008
Alpharetta, GA
Posts: 938
Liked 2 Times on 2 Posts


Quote:
Originally Posted by ajf
Probably a typo

-a.
Nah-- its on every page throughout-- granted, it's for sparging specialty grains in an extract recipe.
__________________
-Stevorino-_________________________________________
In Keezer:
1. BCS - Wet Hopped West Coast Blaster
2. CYBI - Gordon's IPA Clone
3. BCS - Scottish -80
4. BCS - Specialty Saison (Gold Medal at BMO)
In Process:
1. BCS - Janet's Brown Ale (Fermenting)

 
Reply With Quote


Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Grain Volume Calculator mew All Grain & Partial Mash Brewing 4 08-08-2011 09:52 PM
Grain volume? hal2814 All Grain & Partial Mash Brewing 2 08-18-2009 01:09 PM
Volume of Stored Grain Brewsmith All Grain & Partial Mash Brewing 11 03-29-2008 01:50 PM
Volume of grain Cregar General Beer Discussion 4 09-12-2007 08:54 PM
Volume Required for grain? CBBaron All Grain & Partial Mash Brewing 1 03-19-2007 03:09 AM


Forum Jump