Partial Mash sparging question - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Partial Mash sparging question

Thread Tools
Old 05-15-2012, 07:36 PM   #1
May 2011
Millburn, NJ
Posts: 1,385
Liked 126 Times on 96 Posts

I will be trying my first Partial mash this weekend using the Northern Brewer Outmeal Stout. I have a 18x19 fine mesh Nylon bag, and a colander (as well as various pots).

- 2.5 lbs Maris Otter
- 0.5 lbs Black Malt
- 0.5 lbs English Dark Crystal
- 0.5 lbs flaked oats

The instruction say to mash (with 5 quarts of water) for an hour at 152F, then raise the temperature to 170F for 10 minutes, taking care not to scorch the bag.

1. Do I use low-medium heat? And do you suggest partially suspending the bag so it doesn't touch the bottom of the brew kettle?

After the 10 minutes, I remove the wort, and start sparging with another 5
quarts of 170F water. The directions say:

>>9. Sparge the grain. Using a strainer or mesh bag, hold the
grain over the wort in the kettle. Slowly pour the 170 F
sparge water through the grain, one quart at a time, until
its gone. Collect the sparge water along with the wort in
the boil kettle. When finished, you may discard the grain.

2 - do you hold the bag over the pot for a few minutes before sparging, and if so, can this create a sparge problem as it tightens the grain bed?

3 - Since I have removed the wort, If I use a colander&bag, wont the water not sparge evenly?

4 - If I do not use a Colander, and just place the bag in a pot and slowly sparge, wont the bag end up sitting in another pool of wort?

5 - Or am I supposed to put some kind of false bottom in the pot that the bag rests on?

It seems a bit haphazard to have the grain in a bag, being suspended over a pot (with a bungee cord), and slowly pouring water into it.
I guess it will work, but I'd rather get a decent yield. And there are other fermentables supplied.
- 3.15 lbs Dark malt syrup
- 1 lb Briess Dark dry malt extract

Reply With Quote
Old 05-15-2012, 10:00 PM   #2
Aug 2010
Emporia, KS
Posts: 171
Liked 6 Times on 6 Posts

I haven't done any partial mashes, but have done some small BIABs. What I like to do is use 2 pots. I do my initial mash in my boil kettle. Towards the end of the mash I start heating my sparge water in another pot. I heat it to 168-170. After the mash is done I raise the temp of the boil kettle, with the grains still in it, to 168-170. Once that temp is reached i suspend the grains over it until they are slowly dripping, then transfer them to the second pot for 10 minutes. After that time is up i give them a good stir and resuspend them over the boil kettle, then just dump the sparge liquid into the kettle, not over the grains, and start heating to a boil. I always get efficiency over 80% with this method.

Reply With Quote
Old 05-16-2012, 12:13 AM   #3
Feb 2011
Concord, NH
Posts: 108
Liked 6 Times on 6 Posts

You can do something simple like put a glass plate in the bottom of the pot. This provides a buffer between the heat and the bag. Just pull the plate after your sparge.

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Partial Mash Sparging Funnel? gregpio85 All Grain & Partial Mash Brewing 4 01-25-2011 10:41 PM
Partial Mash: Question about procedure and batch sparging.. boralyl All Grain & Partial Mash Brewing 3 06-24-2010 12:09 AM
Sparging partial mash Cos All Grain & Partial Mash Brewing 3 02-08-2008 04:43 AM
Fly Sparging a Partial Mash TheJadedDog All Grain & Partial Mash Brewing 2 09-24-2007 02:03 PM
Partial Mash Sparging Technique... GO! Brewing Clamper All Grain & Partial Mash Brewing 10 03-29-2007 07:59 PM

Forum Jump