Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Calculating water volume
Reply
 
Thread Tools
Old 02-17-2011, 05:01 PM   #1
Islandboy85
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Dallas, Texas
Posts: 681
Liked 12 Times on 10 Posts
Likes Given: 1

Default Calculating water volume

How do you go about calculating your water volume you need for sparging? I've had some shortcomings the last few brews, and had to run indoors and heat up a gallon extra. Is there a general rule or some calculation?


Islandboy85 is offline
 
Reply With Quote
Old 02-17-2011, 05:27 PM   #2
rockytoptim
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
rockytoptim's Avatar
Recipes 
 
Join Date: May 2009
Location: Livonia, MI
Posts: 821
Liked 95 Times on 76 Posts
Likes Given: 3

Default

I use beersmith and it tells me how much sparge water I need. I usually add another gallon to that just so I don't have to hurry up and heat some more if I need a bit more.


__________________
On Tap: Bee Cave Robust Porter
On Tap: Bee Cave OktoberFest
On Tap: Bee Cave Kolsch
Primary: None
Up next: ????
rockytoptim is offline
 
Reply With Quote
Old 02-17-2011, 05:31 PM   #3
Islandboy85
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Dallas, Texas
Posts: 681
Liked 12 Times on 10 Posts
Likes Given: 1

Default

I also forgot to add that I am slightly confused by the terminology "drain the mash tun" when people say they drain the mash tun before the sparge. Are you fully draining the wort out, or just draining until there is 1-2 inches of liquid above the gran bed? The same question for the sparge. Do you fully empty the tun or just drain until the liquid level is at the grain bed?
Islandboy85 is offline
 
Reply With Quote
Old 02-17-2011, 05:58 PM   #4
DakotaPrerunner
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Edmonds, Wa
Posts: 171
Liked 11 Times on 8 Posts
Likes Given: 20

Default

total water=(desired post boil volume/0.96)/(0.925)+(lbs grain in mash x 0.2)+loss due to equipment. Roughly
DakotaPrerunner is offline
 
Reply With Quote
Old 02-17-2011, 06:07 PM   #5
Islandboy85
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Dallas, Texas
Posts: 681
Liked 12 Times on 10 Posts
Likes Given: 1

Default

V
Quote:
Originally Posted by DakotaPrerunner View Post
total water=(desired post boil volume/0.96)/(0.925)+(lbs grain in mash x 0.2)+loss due to equipment. Roughly
So, if I wanted to get 6.25 gal preboil and had 10# of grist it would be 8.52 gallons total. If I'm using 1.5 qt/# I'd have 3.75 gallons strike water leaving me with 4.77 gallons to sparge. Is that right?

What is the significance of the 0.96 and 0.925 and 0.2 in the formula?
Islandboy85 is offline
 
Reply With Quote
Old 02-17-2011, 06:49 PM   #6
rockytoptim
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
rockytoptim's Avatar
Recipes 
 
Join Date: May 2009
Location: Livonia, MI
Posts: 821
Liked 95 Times on 76 Posts
Likes Given: 3

Default

Quote:
Originally Posted by Islandboy85 View Post
I also forgot to add that I am slightly confused by the terminology "drain the mash tun" when people say they drain the mash tun before the sparge. Are you fully draining the wort out, or just draining until there is 1-2 inches of liquid above the gran bed? The same question for the sparge. Do you fully empty the tun or just drain until the liquid level is at the grain bed?
I completely drain the mlt before I add my sparge water. Then after adding sparge water I completely drain the mlt.
__________________
On Tap: Bee Cave Robust Porter
On Tap: Bee Cave OktoberFest
On Tap: Bee Cave Kolsch
Primary: None
Up next: ????
rockytoptim is offline
 
Reply With Quote
Old 02-17-2011, 06:54 PM   #7
Islandboy85
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Dallas, Texas
Posts: 681
Liked 12 Times on 10 Posts
Likes Given: 1

Default

Quote:
Originally Posted by rockytoptim View Post
I completely drain the mlt before I add my sparge water. Then after adding sparge water I completely drain the mlt.
Crap, maybe that's why I run out of sparge water and have efficiency issues.
Islandboy85 is offline
 
Reply With Quote
Old 02-17-2011, 07:09 PM   #8
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 4 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,827
Liked 1342 Times on 878 Posts
Likes Given: 35

Default

You have to differentiate between batch and fly sparging. With batch, you drain the tun. With fly, you don't.
__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
 
Reply With Quote
Old 02-17-2011, 07:42 PM   #9
Islandboy85
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Dallas, Texas
Posts: 681
Liked 12 Times on 10 Posts
Likes Given: 1

Default

Quote:
Originally Posted by Bobby_M View Post
You have to differentiate between batch and fly sparging. With batch, you drain the tun. With fly, you don't.
I've not yet batch sparged. I've heard that it's not quite as efficient, so I didn't want to do any worse than I already did on the last few batches, so I fly sparge. I usually have very little liquid to drain off to begin with sitting on top of the grain bed. The lady at my LHBS said to use more strike water like 1.5 qt/#. She said it helps to give a little more time to establish my flow rate before so I don't run the mash too low and then get channeling.
Islandboy85 is offline
 
Reply With Quote
Old 02-17-2011, 07:58 PM   #10
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 4 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,827
Liked 1342 Times on 878 Posts
Likes Given: 35

Default

Ok. So basically you should fly sparge with the full preboil volume so when you get all the runoff, the tun is still full.


__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why is "shrinkage" taken into consideration when calculating water volume? jmf143 All Grain & Partial Mash Brewing 2 10-28-2010 12:24 PM
Calculating sparge water Toppers All Grain & Partial Mash Brewing 7 11-18-2008 02:17 PM
My formula - calculating sparge water ocbrew All Grain & Partial Mash Brewing 7 05-02-2008 02:54 AM
Volume/calculating the malt bill Brew Alchemy All Grain & Partial Mash Brewing 9 04-17-2008 10:13 PM
Question about calculating necessary amounts of water sonvolt All Grain & Partial Mash Brewing 4 05-07-2006 10:36 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS