I "filter" the wort through a SS mesh screen and I only get an inch or an inch and a half from a five gallon batch.The biggest thing I don’t like about BIAB is the amount of “stuff” left in your wort at the end that recirculating on a different system gets rid of. I tried it a couple times and could not get past the layer of filth that slowly settled into the bottom of my carboy, probably 3” deep on a 3 gallon batch when all was said and done. But I’m a big fan of clear beer, I can’t stand anything hazy.