A friend of mine in brewing has switched from extract to BIAB. I am still an extract brewer but I have most of my equipment for a 2 pump AG system. However he explained to me he still sparges using hot water heated in another vessel, and has problems holding temp (Maybe a burner/insulation issue, he uses a kettle with no insulation).
So, while my initial reaction was that this is a ghetto or cheap all grain method. Its really pretty cool, but with limitations. The AG set-ups i've brewed on before i have done double brews days (mash in batch 2 at boil of batch 1). Also the high gravity or 10 Gal are a no go. And by the time you insulate your kettle and heat up a second pot to pour over bag to sparge with, you have alot of "off brew stand" items.
That being said. This is an awesome way to go all grain!!! I love the simplicity and teaching all the concepts.
I've seen others talk about this before but ill go ahead and coin it (i think). My new cooler mash tun will be based on.... Mash In a Bag!
MIB will still use sparging and pumps (or gravity), but will allow the user to remove the false bottom expense, Easy clean-up of mash tun, Not worry about direct flame to grain (my concern), No more stuck mashes, and maybe more?
Does anyone have thoughts on this?
My mash tun setup is to use BIAB material to line my bottling bucket, with some foil/bubble/foil insulation wrapped around and a lid on top. You probably already have a bottling bucket with a spigot. I use a steamer rack as well to create dead space at the bottom of the bucket so I don't get the entire flow through the spot next to the spigot. I was lucky in that I had a stainless steamer basket that is the perfect size and shape to use as a false bottom in my bucket. I would not recommend using a filter bag for your mash tun without elevating it in some way so that the sparge water rinses the entire grain bill.