Direct fire MT, bazooka screen or false bottom? - Home Brew Forums

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Old 12-30-2010, 02:38 AM   #1
Kerberbb
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Oct 2009
Owasso, Oklahoma
Posts: 115


I am in the process of starting to build a tier unit a piece at a time. I just acquired a keg with ss valve and thermometer. However, no false bottom or screen. I have used a manifold previously in my rectangular coolers as well as a screen when I was doing partial mash. I like the cost of the bazooka tube compared to the false bottom, but am concerned about keeping the grains off the bottom couple of inches of the kettle? Seems like it would be harder to make even heat. I plan on adding a recirculation pump in the future but do not want to be rushed. What would you guys recommend?

 
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Old 12-30-2010, 04:11 AM   #2

I don't recommend direct firing a mash tun at all, unless you're recirculating.

Either way, I'd go with the false bottom.
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Old 12-30-2010, 04:31 AM   #3
Catt22
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Jan 2009
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Full width false bottom and a pump a la a direct fired RIMS system which is what I am using.

 
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Old 12-30-2010, 07:58 PM   #4
Kerberbb
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Oct 2009
Owasso, Oklahoma
Posts: 115

Quote:
Originally Posted by Suthrncomfrt1884 View Post
I don't recommend direct firing a mash tun at all, unless you're recirculating.

Either way, I'd go with the false bottom.

Okay, buy why? Because you want the heat to be even? Please explain, can it be done however?

 
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Old 12-30-2010, 08:05 PM   #5
Frodo
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Nov 2009
Petersburg, AK
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I have nothing nearly this advanced, but do remember the steeping/partial mash days when it was pretty easy to burn grain on the bottom of the pot if I wasn't careful... so I reckon you don't want grain immediately on the bottom of the pot.

 
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Old 12-30-2010, 08:42 PM   #6
Catt22
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Jan 2009
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Quote:
Originally Posted by Kerberbb View Post
Okay, buy why? Because you want the heat to be even? Please explain, can it be done however?
The problem is that there is no way to stir the wort that lies below the false bottom and there is a high probability that this will lead to scorching the wort. Additionally, it will be near impossible to heat the grain bed uniformly by stirring alone. You only need to attempt this once in order to understand. You can, however, do a manual circulation while heating the MT directly. This would be draining wort into a large measuring cup or something similar and returning it to the top of the MT. This can be a lot of work and requires constant attention throughout the mash duration. While you are doing that, visions of pumps will be dancing through your head. I guarantee it!

 
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