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Old 12-13-2009, 06:45 PM   #1
400d
 
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ok, I have a 30 quarts cooler that I want to convert to MLT. This cooler doesn't have a factory made valve, so I have to drill it, and this is my biggest concern.

It seems to me that it has double walls, and if this is true, than I believe it's going to be very difficult to make it leak-proof...

my first question: is it worth to do it with only 30 quarts cooler ( I make only 5 gallon batches), and my second question is, how to do it without destroying the cooler

thank you all!
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Old 12-13-2009, 06:47 PM   #2
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How thick are the walls? As long as they're stiff enough, you should be able to get the gasket to clamp down on the inside wall and make a seal. That's the critical point, where the spigot seals against the inner wall.
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Old 12-13-2009, 06:47 PM   #3
MultumInParvo
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A 30 quart cooler will work well for all but rather big beers. As for the double walls, how thick are they?

I drilled a cooler since it didn't have any valve. It was double walled, but they were close together at the point where I drilled. I just simply pinched them together when I was tightening, and there is no leaking.

 
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Old 12-13-2009, 06:48 PM   #4
MultumInParvo
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Oh, and here is the page I was talking about: http://www.homebrewtalk.com/f11/how-...-needs-123585/

 
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Old 12-13-2009, 07:18 PM   #5
400d
 
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Quote:
Originally Posted by klyph View Post
How thick are the walls? As long as they're stiff enough, you should be able to get the gasket to clamp down on the inside wall and make a seal. That's the critical point, where the spigot seals against the inner wall.
two seperate plastic walls that are probably 3 milimeters thick. between them, I'm afraid there might be some insulating material, but I'm not sure.... the space between the walls is approx. 0,25 inch wide....
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Old 12-13-2009, 07:27 PM   #6
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Another option is to not drill a hole for a valve. I just made a copper tube that comes off my manifold that goes above the water level. I then forces braided vinal hose on it while it was heated up. During the mash the hose and copper tube fold on top of the grain. When I want to take the wort off I just get a syphon going and all is well. I have done this for 3 batches with no problem, one of the batches being a pumpking ale.

 
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Old 12-14-2009, 03:16 AM   #7
klyph
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I don't see the problem. You might have to get a slightly longer spigot piece, but other than that it should work.
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Old 12-14-2009, 03:20 AM   #8
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you could always get some food-grad silicone adhesive and seal your inside fender washer against the cooler wall with it. Just a thought.

Good luck, and enjoy the process, I just finished my MLT today.
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Old 12-14-2009, 03:48 AM   #9
Wade E
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Most coolers are dble walled. if its under 5/8" thick all together where the fitting goes then a normal cooler fitting will work, if its more but not more then 1 1/4" then you need the extended version fitting, heres a link to a place to get either.
http://www.greatbargain.net/order/shop1.html
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Old 12-14-2009, 04:09 AM   #10
Ohio-Ed
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If there is a gap between the inside and outside, and you try to fit a bulkhead through both I think you will have problems. Over time, as you open and close the valve on the end of the bulkhead, unless it is solid it is going to "wiggle" and you will risk leaks.
I read a thread here sometime back about cutting the outside plastic and insulation larger than the inside plastic. Then mount your bulkhead to the inside plastic so there is no "wiggle". I think the thread I read also mentioned adding another layer of plastic to the exterior of the inside plastic to increase the structural integrity.

Good Luck
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