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Old 01-28-2012, 04:45 PM   #1
brewmax25
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So I just fashioned myself a cooler mash tun and I made a manifold on the bottom with some PVC piping that I drilled small holes into. I had issues with the piping getting clogged during the sparge and even during the transfer of wort to the kettle. I had the manifold with the holes facing up during the mash. I want to fix this for my next brew. Any suggestions?
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Old 01-28-2012, 04:54 PM   #2
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Holes or slots in the manifold should face down in your MLT. Or you can purchase a braided 3/4" water heater supply hose, cut the ends off, and use that for your MLT. The latter is what I do, and I have had over 21lbs of grain in my MLT without any issues.
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Old 01-28-2012, 08:40 PM   #3
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I agree with Schnitz, you would want to do the holes down. Gravity or something makes the liquid come out. I also use the braided the house. If you do that, make sure its the HOT WATER HEATER one and not in the faucet section. I wasted 2 houses that way. I also use a fairly thick copper wire and make a spiral to insert inside the braid to give it some extra support.

 
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Old 01-28-2012, 08:43 PM   #4
E-Mursed
 
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Did you say PVC or CPVC...big difference?

CVPC is what you want.
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Old 01-28-2012, 08:48 PM   #5
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use of PVC can create off flavors according to Palmer:

Solvent-like
This group of flavors is very similar to the alcohol and ester flavors, but are harsher to the tongue. These flavors often result from a combination of high fermentation temperatures and oxidation. They can also be leached from cheap plastic brewing equipment or if PVC tubing is used as a lautering manifold material. The solvents in some plastics like PVC can be leached by high temperatures.

 
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Old 01-29-2012, 03:35 AM   #6
brewmax25
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$h#t. Well looks like ill be making myself a new manifold this week for my Friday brew.
Looks like I did everything wrong. I used PVC and the holes were face up.
I'm just going to make a copper manifold.
Thanks for the help.
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Old 01-29-2012, 03:49 AM   #7
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Quote:
Originally Posted by Schnitzengiggle View Post
Or you can purchase a braided 3/4" water heater supply hose, cut the ends off, and use that for your MLT. .
Good advice here!

 
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Old 01-29-2012, 03:54 AM   #8
ClarnoBrewer
 
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I used a round cooler with a ss braid for a long time. Then I switched to a rectangular cooler and made a copper manifold. I used a band saw to saw thin slices halfway through the pipe, and put that side down. I didn't solder it together. It just pushes together and fits pretty snug in the bottom. It makes it easier to clean.

 
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Old 01-29-2012, 04:02 AM   #9
mux
 
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Use copper and cut slots with a hack saw. Slots down. Build it so it fits into the cooler tightly, this way you dont need to solder it to keep it together. Easier to clean.

 
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Old 01-29-2012, 04:14 AM   #10
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Here's my copper manifold. It works fine (75% efficiency). I didn't solder anything, just press fit and squeeze with pliers. It makes it easier to clean and adjust, and does not come apart. Oh, and the slots on face down in actual production mode, I had just pressed it together in this shot .

If you have access to an angle grinder, it makes cutting the slots a lot easier.
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