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Old 06-18-2010, 01:07 PM   #11
erkwist
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added to the to do list:
1. Measure all containers
2. Make dipstick for both boil kettles
3. Find missing drive from german world cup team, what happend to them?



 
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Old 06-18-2010, 01:56 PM   #12
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I really like the dipstick idea; would be so cool to get a couple of "real" dipsticks from a big-block chevy or ??; acid clean, mark 1/2 gal increments . . .


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Old 06-18-2010, 03:59 PM   #13
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Let's all keep in mind that the VOLUME of water will change with it's TEMPERATURE. A hotter liquid will expand as the subatomic particles increase their speed and the distance of their orbits around the Nucleus.

So, if you want to use the side of a pail, or a diptick, you really need to adjust for whether it's a hot 5 gallons of water, or a cold 5 gallons of water. There can be a measurable amount of difference there.
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Old 06-18-2010, 04:17 PM   #14
erkwist
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Do whats used then, measure and mark what is being used. "Cold" side of dipstick for water going into kettle, hot side for pre-boil after the mash to double check and mark the level on fermentors at Pitching temps.

 
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Old 06-18-2010, 04:54 PM   #15
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Quote:
Originally Posted by Homercidal View Post
Let's all keep in mind that the VOLUME of water will change with it's TEMPERATURE. A hotter liquid will expand as the subatomic particles increase their speed and the distance of their orbits around the Nucleus.

So, if you want to use the side of a pail, or a diptick, you really need to adjust for whether it's a hot 5 gallons of water, or a cold 5 gallons of water. There can be a measurable amount of difference there.
I believe the change in volume between boiling and room temp is ~4%.

Or basically ~5 oz. per gallon (probably not too much of an issue for the homebrewing scale)

 
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Old 06-18-2010, 05:07 PM   #16
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So it figures out to just over a pint per 5 gallons... Not much actually. I thought it was more like a half-gallon for some reason.

Anyway, I don't know what the thermal expansion of wort would be, maybe it's even more? Might not end up being enough to worry about after all.

My plan was to create a spreadsheet and chart the height of the water for each .25 gallons on a column, and have each pot in my collection shown in the rows, up to their maximum volume. Print it out and have a copy laminated to I don't ruin it during use.

I would place the vessel on my scale and add water, noting the height of the water at each .25 gallons. This method would be more accurate than trying to use a measuring cup to add water.
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Old 06-18-2010, 05:14 PM   #17
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The dipstick is a great idea, but I'd use something more inert and less susceptible to infection than wood; stainless steel or food grade plastic (maybe mark a big spoon).

Also keep in mind most carboys are different as well. I have 4 six gallon carboys and 2 five gallon carboys and they are all different.
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Old 06-18-2010, 07:12 PM   #18
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When I first filled my ale pail up I used these one gallon containers we have at my house to put iced tea in to fill up the pail with water... Came exactly to five gallons. Mines turned out fine.

I do agree that everyone should measure their ale pails.

 
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Old 06-18-2010, 07:34 PM   #19
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Home depot sells 1"x36" pieces of aluminum that I used. Did it with cold water and used a dremel to make marks every 1/2 gal. Works like a champ. I did notice that the level varied a bit from one side of the kettle to the other, so I calibrated right at the valve, and use that as the spot I measure from.
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Old 06-18-2010, 09:10 PM   #20
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Quote:
Originally Posted by RedGlass View Post
If you want to get really accurate...measure 1 gal with a measuring cup as you add it to your gallon jug and draw a fill line. I've found most gallon jugs to be closer to 1.25 if filled all the way up.
+1 on this. If you filled your gallon jug all the way to the top, you had more than a gallon of water in it.



 
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