Those big batch pics you're showing from Wilser's website are of a big volume mash, but not very big grain bill. A lot of that volume is still in the kettle in the form of wort.
This is something like 14-16lbs in a 5G kettle. 1qt/lb. Trying to get a hitch on the bag itself is really tough. By the time it's drained it could more easily be done, but by that point why bother.
ETA: That's my annual once a year big brew. 1.100 barleywine or imperial stout. Ya gotta do what ya gotta do. My typical brew is the same push-the-limit mash volume @ 1040-60 @ 5-8lbs and I choke the bag easily.
This is something like 14-16lbs in a 5G kettle. 1qt/lb. Trying to get a hitch on the bag itself is really tough. By the time it's drained it could more easily be done, but by that point why bother.
ETA: That's my annual once a year big brew. 1.100 barleywine or imperial stout. Ya gotta do what ya gotta do. My typical brew is the same push-the-limit mash volume @ 1040-60 @ 5-8lbs and I choke the bag easily.
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