Water Volume Help - Home Brew Forums

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07-10-2011, 02:27 AM   #1
FooFan

Recipes

Jan 2011
Lilburn, GA
Posts: 90
Liked 2 Times on 2 Posts

Hi All...
I need help with some water voulme stuff...
Batch size is 5.25 gallons
11.40 poumds of grain
60 min boil

My promash worksheet says:
Sparge amount 7 gallons
Total into mash (is that dough in ?) 5.75

I am gonna fly sparge is that what i need ti shoot for?

Thanks,
FooFan

07-10-2011, 02:56 AM   #2
MalFet
/bɪər nɜrd/

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May 2010
NYC / Kathmandu
Posts: 8,632
Liked 1474 Times on 975 Posts

Those numbers aren't right. With eleven and a half pounds of grain, you're going to lose about a 1.4 gallons to absorption. Assuming you lose another gallon to evaporation during boil, your total water additions should be in the neighborhood of 7.65 gallons. You can split that between strike water and sparge water however makes sense for your system.

07-10-2011, 02:51 PM   #3
Tall_Yotie
Recipes

Jul 2010
Santa Cruz
Posts: 971
Liked 13 Times on 13 Posts

Going to do some quick calculations here.

Assuming 1.25qt/lb mash thickness:

Strike water = 3.5g approximately

Absorbed by grain = 1.4g approximately

Total from first running = 2.1 gallons

Sparge water = 4.4 gallons

Total collected = 6.5 gallons

Adjust sparge water to adjust total wort collected if you need less or more.

07-10-2011, 03:58 PM   #4
OLDBREW
Recipes

Oct 2009
SJ
Posts: 759
Liked 5 Times on 4 Posts

ProMash allows you to figure how much sparge water is needed or total water needed. It will default to 7 gals. normally.

When you open up the stand alone "Water Needed Calculator" it will have many boxes to fill in about your equipments defaults.. sparge vessels dead space, total grain used, water to grain ratio (qts/#) used, losses from other equipment, evaporation rate, boil time, and so on.

Once you enter the data for your equipment, it tells you how much you will receive from the mash after absorbtion, and losses from the tun. It also tells you how much evaporation loss you'll have, all boiler, and other equipment losses that you have dialed in.

At the bottom it even has pre-chilled volumes listed, and into the fermenter after 4% shrinkage volumes in red highlghted boxes.

What you do is adjust the sparge water volume (after telling the software about any losses your rig has) and watch the "to fermenter after cooling" box highlighted in red.

When that box reads the proper batch size of the final product. Look up at the sparge amount box.. that is how much you will need in sparge water.