I’ve been brewing with a current-model Anvil foundry (with a March pump to recirculate, as well as a swirly arm to whirlpool) for about a year and a half, after about 15 years of cooler batch sparging. It’s easier and faster and takes up less space, but mostly it seems a lot safer now that I have young kids. I recently bought a second never-used open box 2021-model foundry from someone slipping out of the hobby and have been thinking of the possibilities.
The biggest con for my about the foundry vs my old setup is the grain limit and ::much:: lower mash efficiency pretty much prevents me from brewing anything over 1.070. I still have my old system, though, so I figure I can always just brew a big beer the old fashioned way. Then I got an idea to BIAB with one of the brew bags they sell for the foundry and a hoist setup in my back patio. Could I partigyle with my dual foundries? Obviously I CAN do this, but I wonder what the upper limit of grain would be here. The max volume is 10.5 gallons, but I think keeping it under 10 would allow the (admittedly unnecessary) recirculating part to work better. I figure I could mash, hoist the grain out, slide the grain into my second foundry, give it a stir, and hoist it back out.
Does anyone have an easy calculation of what my realistic max grain limitation would be with 10 gallons, assuming I want enough water to end up with at least 6.5 gallons of sweet wort?