Marking your brew pot - Home Brew Forums

 Home Brew Forums > Marking your brew pot

03-29-2009, 01:49 AM   #1
alee
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Jan 2009
Southern Indiana
Posts: 82

I used my 9 gal stainless brew pot for my first all grain this afternoon. Because I wanted to know when I was at my target 6.5 gal wort level and then my 5 gal target level, I did a little search and found this website for calculating the depth of liquid for a particular volume and radius pot.
Cylinder Calculator
You will have to convert gallons required to cubic inches (multiply by 231) to get the required depth in inches.
I then took a blunt screwdriver and hammered a very slight indentation on the outside of the pot at both the 6.5 and 5 gallon marks so that is showed though on the inside of the pot. It saves measuing with liquid and wasting water!
Hopefully someone will find this useful.

03-29-2009, 03:23 AM   #2
newbeerpig
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Jan 2009
Northern California
Posts: 128
Liked 9 Times on 2 Posts

Very useful, dang math though... will be very useful for my new kettle because it doesn't have any marks inside.
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03-29-2009, 03:31 AM   #3
GunnerMan
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Jun 2008
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I just measured my pot like you did and found a gallon = 2.1 inches or so in my pot, so I took a yard stick and put marks every 2.1 inches. I did this on each of my pots on each end of the stick.
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03-29-2009, 03:33 AM   #4
McKBrew

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Oct 2006
Hayden, Idaho
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You guys are too smart.

I just poured in a gallon at a time and marked the stick after each one.
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03-29-2009, 04:43 AM   #5
beesy
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Mar 2008
Posts: 749
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very nice......however I just want to throw another comment in.

I it would be interesting to see how well you math measures up to the fill and mark method due to differences in abilities to accurately measure the radius of your pot. I would think unless you had a very large set of calipers or other fine measuring device, you could be off a little. Also, ever notice most pots are not perfectly vertical? This will also throw your measure off because the distance between marks becomes less as you read the caudal side of the pot (smaller diameter at bottom than top) as most are tapered slightly out as they are pressed into shape and this allowed the die to come out of the pressed pot easier. Just something to think about....

03-29-2009, 10:23 AM   #6
alee
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Jan 2009
Southern Indiana
Posts: 82

My five gallon mark was pretty darned accurate. I measured 5 gallons of water into my 6 gallon carboy and marked the outside with permanent ink. My 5 gal of wort filled the carboy really close to the mark.
I was really just shooting for an estimate. My pot looks pretty straight to me. Also, I just measured the diameter and divided by 2!

03-29-2009, 02:13 PM   #7
GunnerMan
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Jun 2008
Posts: 436
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Yeah you will be off a bit but the day I cause my self to go through enough stress to make sure my volumes are accurate to the 1/20th of a gallon is the day I quit brewing. I measured my marks to at the 1 and 2 gallon for accuracy and they were fine. My ag batch last night yeilded the perfect amount so I think I am ok.
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Primary : Honeybuns Weizen, Ode to Arthur(with partial sour)
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Bottled: Cream of Three Crops, Hazed and Infused Clone
Planned: A green chile beer, I live in New Mexico gotta have the green chile beer.

Quote:
 Originally Posted by Duckfoot Two days into my last batch made and the scent of the farts of a thousand rhinos is permeating the basement... Life is good...

03-29-2009, 04:17 PM   #8
Matt Up North
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Jul 2008
Santa Rosa, CA
Posts: 2,023
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Home depot, get a dowel for a buck, measure 5 gallons into the pot, stick the dowel in and mark it. Then add a gallon and mark that, and so on and so on. Best buck you have spent
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05-19-2011, 03:00 AM   #9
ryan0914

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Nov 2009
Morris Plains / Morristown, New Jersey
Posts: 287
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Another formula to figure this out so you will know the exact measurement

"Volume"- 1 gal,2 gal 3 gal... the volume you want to know the height of..(usually use 1 for the height of 1 gal)

"231"- the formula is for cubic inches and there are 231 cu/in in 1 gal so that converts to gal

"h"- height in inches your looking for. (usually use 1)
this is to find how many inches

05-19-2011, 03:06 AM   #10
bruin_ale

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May 2009
Campbell, CA
Posts: 1,436
Liked 21 Times on 21 Posts

Yeah, dip stick is great and basically free (did that for years) - but a sightglass is so much nicer. If you're doing all grain, it should be required. Much easier to just watch the liquid level drop on a sightglass to tell how much water you moved from HLT to mash.