I recieved my Tap a Draft system with 6L (1.5gal) bottles, and i'm thinking about buying a BIAB to brew 2gal batches, so I can keep session beers on tap to drink when we meet once a month, my collegues and I, to brew big batches of big beers.
I was wondering if I can batch sparge with a BIAB. I explain what I'm thinking.
-Mash with a normal water/grain ratio, as used in All-Grain.
-Heat up to mash out
-Lift and drain the bag
-In another kettle, soak the bag in the sparge water, at sparge temp.
-Blend and boil
Should I expect a better effiency that way? These will be mostly session beer, around 4-5% abv, and I usually use a fine grind, so I was expecting near 70% efficiency. Is it possible?
Thanks a lot!