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Old 07-29-2012, 08:50 PM   #1
aeviaanah
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Default Why are false bottoms domed?

Getting ready to make a stainless false bottom, curious to why it is domed?

All I can think of is it adds strength, no support required underneath.



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Old 07-29-2012, 09:48 PM   #2
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I imagine that it limits the dead space too



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Old 07-29-2012, 10:07 PM   #3
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NorCal/Jaybird false bottoms are flat (like-a you head).

They make them to fit all kinds of things. Such as kegs, coolers and kettles. The ones not going in kegs are usually made with feet to keep some space under them. Which a dome could also do. I would trust a NorCal false bottom over one of those domed ones every day of the week and thrice on brew day.

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Old 07-30-2012, 05:39 AM   #4
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Science. It's explained in the appendix section of Palmers book. I think it's from a thesis he used in graduate school. In laymans terms, the way I understand it is that a domed shape sets the most even grainbed and increases extraction.

That said, I use a flat one from Jaybird and it works great. Got 83% mash efficiency with it today

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Old 07-30-2012, 06:02 AM   #5
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It also helps to prevent a vacuum as there may be an airspace above the liquid at times. IMHO. Flat ones work too..

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Old 07-30-2012, 01:41 PM   #6
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Am I the only one who read that as "why are false bottoms doomed"?

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Old 07-30-2012, 01:48 PM   #7
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Quote:
Originally Posted by billl View Post
Am I the only one who read that as "why are false bottoms doomed"?
Yup
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Old 07-30-2012, 11:38 PM   #8
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Well I can make a flat one fairly easy or a cone shaped one which is only 1/2" tall with a little more effort. What u think I should make? Will I benefit from one shaped like Raidens hat?

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Old 07-30-2012, 11:48 PM   #9
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Quote:
Originally Posted by billl View Post
Am I the only one who read that as "why are false bottoms doomed"?
Nope... I read it the same way! Poor False Bottoms.. LOL
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Old 07-31-2012, 12:00 AM   #10
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Quote:
Originally Posted by aeviaanah View Post
Well I can make a flat one fairly easy or a cone shaped one which is only 1/2" tall with a little more effort. What u think I should make? Will I benefit from one shaped like Raidens hat?
Depends on what you are using as your MLT. Anything with a flat bottom will need legs/dome/cone to alow some space under the FB for the wort to flow. With a keg with a concaved bottom a flat should be no problem.


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