11/26/2023 0 Comments Anvil foundry max grainDidn't need to squeeze the bag once to hit my preboil volume and perhaps thats where I fell a little short. I got my 5.75gal in the fermenter as expected but my losses in the kettle, hoses, hydrometer volumes combined with what I put into the fermenter was about a quart short. NEIPA, OG was suppose to be 1.069, ended up being 1.071. I hadn't considered your comments about evaporation during mash or the fact that grain mass might decrease, but I wouldn't even know where to begin with those computations lol. But squeezing doesn't account for all of these discrepancies. So Ive come to the conclusions that beersmith probably doesn't account bag squeezing in grain absorption regardless if you are using the "grain absorption" or "BIAB Grain absorption" options. So this is always lower when I calculate it myself. Then to get the absorption rate, I converted 0.70gallons to 89.6fl oz and converted my grain weight to ounces of grain which was 230.08 oz of grain. I gave one good squeeze until I reached my pre-boil volume. While I didn't measure it, I am certain is was under a quart. So thats a 0.56gallon difference and I am VERY confident that I didn't squeeze over a half of a gallon from that bag yesterday. Beersmith told me it would be 1.26gallons (my grain absorb is set at 0.70floz/oz in beersmith. I then converted this to gallons by dividing by 8.35lbs/gallon and I got ~0.70gallons of wort leftover in the bag. For example: yesterday I brewed and the bucket+grain bag weighed 20.2lbs and after subtracting the weight of the bucket when empty and grains (based on the original dry weight of grains), I was left with 5.82lbs. I do neglect the weight of my wilser bag in this. I then subtract the weight of the bucket and the grains which leaves me with liquid/wort. Ive put known weights on it before and it appears accurately calibrated. After Im done with the bag that is hanging over the kettle, I remove from hoist and immediately put into a bucket and weigh it on a digital bathroom scale. ![]() So heres what I do, so if you notice something thats off, I'm all ears. What I'd lose in efficiency by not squeezing quite as hard I should more than make up for with a sparge. I really had the put some effort into the squeeze. ![]() I'm considering bumping up my grain absorption slightly and doing a 1 gallon sparge on the next batch. Tiny bit of scrubbing on the kettle and grain basket, otherwise everything rinsed off nice and clean. I'm planning to pick up a mill in the near future, should be a free 3-5% right there.įor clean up I put about 2.5 gallons in, dumped in some PBW, brought it up to 120 and used the pump to run the mixture over everything. Mashed out at 168 for 10 minutes and squeezed the hell out of the bag to get my pre-boil volume. Did a 90 minute mash, waited 15 minutes to start recirculation and raked the top of the grain bed every 15 minutes. Volume and gravity readings were all as predicted, pretty happy about that.Įnded up at 75% mash/lauter efficiency with a full volume mash, right on target. Pretty much a perfect brew day today running my 3rd batch on the 10.5 AF.
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