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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Is a 7&1/2 gallon pot big enough to brew a 5 gallon all grain batch?
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Old 09-08-2013, 02:38 AM   #1
BonzoAPD
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Default Is a 7&1/2 gallon pot big enough to brew a 5 gallon all grain batch?

Is a 7&1/2 gallon pot big enough to brew a 5 gallon all grain batch? Not doing BIAB, using a 52qt mash tun.

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Old 09-08-2013, 02:46 AM   #2
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I have an 8 gal pot and its just barely big enough. I start with 6.76 gal and once it starts to boil its right up to the top. IMO a 10 gal pot is a must

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Old 09-08-2013, 02:51 AM   #3
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Not likely...even at 6.6 gallons, you only have less than half a gallon of space. I wouldn't try it.

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Old 09-08-2013, 02:52 AM   #4
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Do you already have it? If so it's doable not necessarily ideal, you just have to watch it like a hawk. If you don't own it yet I would recommend the largest pot you can afford. When I was BIAB that is what I used so I know it's possible.

Once I moved to 5 gallon AG batches I moved to 10 gallon ones once I realized how easy it was. And if you think now that you have no interest in making 10 gallons at a time (like I thought) but you realize that for only an hour or so more to double your batch you will be glad you bought that giant pot.

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Old 09-08-2013, 04:12 AM   #5
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10 gallon is a must. If I were you I would at least buy "Fermcap" - which is a great product that will help prevent boil overs. You just add a couple drops for every gallon that you are boiling, and it really helps out. In addition, I would stand guard with a spray bottle of water, with my hand on the burner control.

You could do it if you are really careful - I would probably set a fairly low boil initially, then increase the burner as it boils off. You could then simply add water mid-way through the boil to ensure that your rigorous boil time is adequate, if you are using a low boil initially. You want a rigorous boil for as long as you can, but you may not be able to crank it up till mid-way through or so.

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Old 09-08-2013, 04:22 AM   #6
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I use a 7.5 gallon for 5 gallon full boil batches. As stated above. Use fermcap s and watch it like a hawk. It is possible but I'd go bigger if I didn't already have the 7.5gallon pot.

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Old 09-08-2013, 04:33 AM   #7
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I often do 6 gallon batches in an 8 gallon pot. What you are describing is possible to do even without fermcap, but you do need to be very attentive and know that you will lose a little bit every once in a while and will likely have to relight the burner at least once during the boil.

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Old 09-08-2013, 04:46 AM   #8
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I use a converted pony keg - 7.75. I start the boil at about 6.75 gal.

It works fine, though as noted above it requires some careful attention, and fermcap is very helpful. Once the boil gets going it stops foaming, you can turn the heat way down, and the risk of a boilover is gone.

Larger than 7.5 gal is definitely not a must. It just requires a careful start to the boil.

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Old 09-08-2013, 05:05 AM   #9
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I used a 7.5 gallon pot and would start the boil with near 7 gallons to boil to 5.25. It is doable but you really have to start with a very mild boil until some is lost to evaporation. I would definitely suggest that you do this outside as it is nearly impossible not to get some what I would call slop over. You get a burst of bubbles and a wave slops over the side.

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Old 09-08-2013, 09:23 AM   #10
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I have used a 7.5 gallon pot for all of my brews. While it works, its not very easy and watching for boil overs is a complete pain.

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