which manifold arms do I slot for a lauter tun?

which manifold arms do I slot for a lauter tun?

Post by Scott Fuhrm » Thu, 09 May 2002 06:32:35



I am making a lauter tunout of a picnic cooler, and would like to know
which parts of the manifold I should "slot" with a saw.  My manifold
something looks like this:

1     2     3     4

|-----|-----|-----|     5
|     |     |     |
|     |     |     |==== <--outlet goes to ball valve
|     |     |     |
|-----|-----|-----|     6

My question is which tubes to I "slot" with my saw?  All of them, or
just the ones that are vertical in my picture (tubes labeled 1,2,3,4)?

Hope this comes out allright.

Thanks,

Scott

 
 
 

which manifold arms do I slot for a lauter tun?

Post by D Schult » Thu, 09 May 2002 07:41:39


I'd do all of them but the outlet pipe.

Scott, weren't you a LA Cop on the Simpson case?

Burp,
-Dan


Quote:
> I am making a lauter tunout of a picnic cooler, and would like to know
> which parts of the manifold I should "slot" with a saw.  My manifold
> something looks like this:

> 1     2     3     4

> |-----|-----|-----|     5
> |     |     |     |
> |     |     |     |==== <--outlet goes to ball valve
> |     |     |     |
> |-----|-----|-----|     6

> My question is which tubes to I "slot" with my saw?  All of them, or
> just the ones that are vertical in my picture (tubes labeled 1,2,3,4)?

> Hope this comes out allright.

> Thanks,

> Scott


 
 
 

which manifold arms do I slot for a lauter tun?

Post by David Bour » Thu, 09 May 2002 18:59:33


IIRC, according to John Palmer, you would slot pipes 5 & 6 only.

Check howtobrew.com, all the info on manifold design is there.

Regards,
Dave.

 
 
 

which manifold arms do I slot for a lauter tun?

Post by MDixo » Thu, 09 May 2002 21:03:50



Quote:
> I'd do all of them but the outlet pipe.

I agree.

Cheers,
Mike

 
 
 

which manifold arms do I slot for a lauter tun?

Post by Scott Fuhrma » Fri, 10 May 2002 00:14:11


Hmm.. Thanks for the link.  It looks like I might have some redesigning
to do.

Scott

Quote:

> IIRC, according to John Palmer, you would slot pipes 5 & 6 only.

> Check howtobrew.com, all the info on manifold design is there.

> Regards,
> Dave.

 
 
 

which manifold arms do I slot for a lauter tun?

Post by John 'Shaggy' Koles » Fri, 10 May 2002 00:06:54



Quote:
>My question is which tubes to I "slot" with my saw?  All of them, or
>just the ones that are vertical in my picture (tubes labeled 1,2,3,4)?

Personally, I'd slot all of them except for the outlet pipe.

John.

--
                           *** John P. Kolesar ***

           *** Head Administrator, Monty Python's Flying Talker ***
        **************************************************************

 
 
 

which manifold arms do I slot for a lauter tun?

Post by MDixo » Fri, 10 May 2002 00:50:35



Quote:
> Hmm.. Thanks for the link.  It looks like I might have some redesigning
> to do.

He is giving you the correct link, but the incorrect information.  The link
page is http://www.howtobrew.com/appendices/appendixD-2.html the information
to take away is so long as you stay and appropriate distance from the wall
of the cooler (http://www.howtobrew.com/appendices/appendixD-1.html), the
more slots and the more evenly distributed, the better.

Wort will flow within the tubes until the outlet depth is reached, so slot
eveything but the last outlet pipe.

Cheers,
Mike

 
 
 

which manifold arms do I slot for a lauter tun?

Post by Mike Kesle » Fri, 10 May 2002 01:14:20


I slottled all my pipes and have been able to get up to a 84% mash
effeciency. Now I'm on to designing my RIMS.


Quote:
> I'd do all of them but the outlet pipe.

> Scott, weren't you a LA Cop on the Simpson case?

> Burp,
> -Dan



> > I am making a lauter tunout of a picnic cooler, and would like to know
> > which parts of the manifold I should "slot" with a saw.  My manifold
> > something looks like this:

> > 1     2     3     4

> > |-----|-----|-----|     5
> > |     |     |     |
> > |     |     |     |==== <--outlet goes to ball valve
> > |     |     |     |
> > |-----|-----|-----|     6

> > My question is which tubes to I "slot" with my saw?  All of them, or
> > just the ones that are vertical in my picture (tubes labeled 1,2,3,4)?

> > Hope this comes out allright.

> > Thanks,

> > Scott

 
 
 

which manifold arms do I slot for a lauter tun?

Post by Ross Rei » Fri, 10 May 2002 01:36:44


Quote:

>I am making a lauter tunout of a picnic cooler, and would like to know
>which parts of the manifold I should "slot" with a saw.  My manifold
>something looks like this:

>1     2     3     4

>|-----|-----|-----|     5
>|     |     |     |
>|     |     |     |==== <--outlet goes to ball valve
>|     |     |     |
>|-----|-----|-----|     6

>My question is which tubes to I "slot" with my saw?  All of them, or
>just the ones that are vertical in my picture (tubes labeled 1,2,3,4)?

>Hope this comes out allright.

>Thanks,

>Scott

Given that you have the correct spacing between the lines, and from
the walls of the tun, your manifold will work better if you reduce the
distance runoff must travel to get to the outlet i.e., if the outlet
came off the centre of line 5 in your diagram (between line 2 and line
3), and all the pipes were slotted with the exception of the outlet
pipe. That way runoff will have a more direct route to the outlet
pipe.
In other words, the majority of the collection pipes in your manifold
should run in the same direction as the outlet pipe.
Looking at your diagram, wort collected in the centre of line 1 must
travel half of line 1, all of line 5 and half of line 4 to get to the
outlet.
With the drain in the centre of line 5, that same wort collected in
the centre of line 1 must travel only half of line 1 and half of line
5 to get to the outlet.
 
 
 

which manifold arms do I slot for a lauter tun?

Post by Mike Kesle » Fri, 10 May 2002 03:39:51


Good job Mike,

If the inside pipes aren't slotted (allowing sparge water through), the
water won't seperate those grains from the sugars as well, leaving sugars in
the mash tun, thus giving less of an extraction efficiency.


Quote:



> > Hmm.. Thanks for the link.  It looks like I might have some redesigning
> > to do.

> He is giving you the correct link, but the incorrect information.  The
link
> page is http://www.howtobrew.com/appendices/appendixD-2.html the
information
> to take away is so long as you stay and appropriate distance from the wall
> of the cooler (http://www.howtobrew.com/appendices/appendixD-1.html), the
> more slots and the more evenly distributed, the better.

> Wort will flow within the tubes until the outlet depth is reached, so slot
> eveything but the last outlet pipe.

> Cheers,
> Mike

 
 
 

which manifold arms do I slot for a lauter tun?

Post by David Bour » Fri, 10 May 2002 17:24:23


Mike corrected:

Quote:
> He is giving you the correct link, but the incorrect information.
> so long as you stay and appropriate distance from the wall
> of the cooler the more slots and the more evenly distributed, the better.

To quote JP:
"The transverse tubes in the rectangular tun should not be slotted to
prevent channeling. The longitudinal slotted tubes adequately cover
the floor area without the transverse tubes help. The slots can face
up, down or to the side; hydraulically, it makes no difference. In a
circular tun, the same guidelines apply but the transverse tubes can
be slotted where they are away from the wall"

Looking at the design, I'd say Scott's picnic cooler was rectangular
so no slotting of pipes 1, 2, 3 or 4.

Given that you shouldn't slot the two outside pipes (I didn't know
that), thats no slots in pipes 5 and 6 either !

Might have a problem with a stuck sparge or two :-)

Regards,
Dave.

 
 
 

which manifold arms do I slot for a lauter tun?

Post by MDixo » Fri, 10 May 2002 22:00:47



Quote:
> Mike corrected:

> > He is giving you the correct link, but the incorrect information.
> > so long as you stay and appropriate distance from the wall
> > of the cooler the more slots and the more evenly distributed, the
better.

> To quote JP:
> "The transverse tubes in the rectangular tun should not be slotted to
> prevent channeling. The longitudinal slotted tubes adequately cover
> the floor area without the transverse tubes help. The slots can face
> up, down or to the side; hydraulically, it makes no difference. In a
> circular tun, the same guidelines apply but the transverse tubes can
> be slotted where they are away from the wall"

You are taking it out of context the design that note refers to is above it
on this page:
http://www.howtobrew.com/appendices/appendixD-1.html

The particular diagram it refers to is
http://www.howtobrew.com/images/f165.gif

As long as he maintains the proper distance from the wall, then slotting the
transverse tubes is fine. If he is however too close to a wall, then yes,
channeling will occur.

Quote:
> Looking at the design, I'd say Scott's picnic cooler was rectangular
> so no slotting of pipes 1, 2, 3 or 4.

> Given that you shouldn't slot the two outside pipes (I didn't know
> that), thats no slots in pipes 5 and 6 either !

I'd redo his design, take into account the distance from the wall on all
pipes, longitudinal and transverse.  Install crosses down the center and
slot everything but the last pipe.

Cheers,
Mike

 
 
 

which manifold arms do I slot for a lauter tun?

Post by MDixo » Fri, 10 May 2002 22:02:32



Quote:
> Scott,
> Based on my experiments (see book, and hbd archives) the best results are
> obtained by spacing the pipes no more than 2-3 inches apart, and not
> slotting the ones that run right along the walls. If you slot the ones
along
> the walls, you encourage fluid flow to run down the walls rather than thru
> your grainbed. Of course for best extraction, you want it to flow thru
your
> grainbed.

> Let me see if I can summarize this:
> 1. Space your pipes 2-3 inches apart.
> 2. Position the outside pipes no closer than half of your pipe-spacing
away
> from the walls.
> 3. And, as a design example, orient the tubes longitudinally to your drain
> like in Figure 165 at
> http://www.howtobrew.com/appendices/appendixD-1.html

If he takes into accound the spacing from the walls, and keeps them that far
away, then why not slot them?

Cheers,
Mike