What are the restraints on the 5 gallon deluxe cooler systems like the ones that are sold here at NB? How many pounds of grain can you mash in these and what is the limit? I am going to take the leap into all grain soon and i have a couple 5 gallon coolers already that i got for free. Just wondering what my limitations will be while i’m using them.
Rule of thumb is 0.09 gal/lb for grains. So at 1.0 qt/lb (about the max for a mash being workable, IMHO) you’d top out at around 14 lb of grain, enough to brew a 5 gal batch up to about 1.075.
I just mashed 13lb of grain in my 5gal cooler (actually it hold 5.5gal). I think my mash ratio was 1.5 and it all just fit. A 5gal limits you a bit for 5gal batches, but only with the big beers.
I double sparged that batch and got a nice efficiency.
Google Green Bay Rackers, they have a “Can I Mash It?” volume calculator. Play with it and you’ll see what you can do. You can go 1qt/lb but thats pretty darned thick and a pain to stir. I’d definitely mash longer (thick mashes don’t convert quite as fast) and do two small sparges for a batch done that way.
Just playing, you could go 16lb with 1qt/lb (=4gal) and it would just fit. You’d drain off 2gal (1pint sticks to a lb of grain) and if you sparged twice with 2 gal each time, I bet you’d get 75% efficiency at a 6gal preboil volume. Thatd give you the ability to do a 1.086 OG beer.
Thanks for your replies. I guess i’ll just roll with the 5gallon coolers i already have and then if i want to i’ll upgrade in the future. That works for me! Happy brewing…
My rubbermaid round cooler is great and holds temp like a champ due to little headspace but I have maxed out at 1to1 at 13 lbs.
I had a huge rectangular MLT for a while but it met with an unfortunate accident so I re built with a round 5g
luckily i am a 1.060s beer sort of guy and that was a factor in my decision
In my experience I have to vorlauf MUCH less than I did previously. it has some obvious limitations but my extract efficiency is consistently in the high 70s low 80s and the system was very easy to dial in
I started with this system also but later moved to the Denny-style rectangular hose braid & batch sparging and have never looked back. Had many issues with stuck sparges with the false bottom and couldn’t make any recipe I wanted. I also wasn’t getting consistent gravities out of the system. The Denny-style has gotten my consistency where it needs to be for me to focus on getting the results I want from the recipes I want. Still use the 5 gallon HLT, but without the whirlgig sparger.
I just joined the ranks of the blue cooler mashers with a Coleman Extreme 70qt. I put it to good use yesterday with 25lb of malt and 2qt/lb, 14.5gal of the 17.5gal volume. We brewed a 15gal batch of best bitter. I still have a 5gal round cooler MLT and a little 3gal cooler MLT, so I’m covered as far as batch size.