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Home Brew Forums > Home Brewing Beer > DIY Projects > Chillers and Stir Plates > Counterflow Chiller Tutorial
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Old 03-30-2008, 04:11 PM   #81
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I have gross tons of copper laying around the house from various past projects; I think I'll build a CFC. My question--in true n00b form--is this: when gravity feeding a CFC, does it require merely one pass to reduce to pitching temps? Does one need to pour from a collection bucket back into the kettle and send it through for a second pass?

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Old 03-30-2008, 06:54 PM   #82
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A single pass brings the wort output temp to about 5F above the coolant temp. So, 65F coolant will get you near 70F wort output.

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Old 03-30-2008, 07:35 PM   #83
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Bobby M: I'd assume the change in temperature is dependent on the length of tubing in the CFC, with matching the coolant's temperature being the maximum potential. I brought the image of the Chillzilla into photoshop and figured approximately 14 feet of tubing in the chiller. I have 50 ft. at my disposal. Logically, after a certain length, extra tubing becomes superfluous and a waste of money for little effect on temperature change. What length of tubing would you suggest I use for my DIY chiller?

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Old 03-30-2008, 10:37 PM   #84
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I'll tell you this much, I pump at 3-4 gpm through 25' and get within 5' of the coolant. If you are gravity draining, I believe you could go shorter, since the wort spends more time in the chiller.

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Old 03-30-2008, 11:58 PM   #85
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I'd stick with 25. It's a little overkill for a gravity drain, but you'll be glad if you ever buy a pump.

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Old 03-31-2008, 02:17 AM   #86
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Quote:
Originally Posted by Bobby_M
I'd stick with 25. It's a little overkill for a gravity drain, but you'll be glad if you ever buy a pump.
and i bet you will, I think a pump was one of the greatest additions to my brewery. I'd recommend that anybody using a cfc, eventually get a good pump.
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Old 04-07-2008, 11:33 PM   #87
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Quote:
Originally Posted by kinison_fan
Nice tutorial Bobby, and great timing- I've got all the stuff sitting on my workbench to put mine together tommorow. I bought my 50' copper tubing (3/8) from coppertubingsales.com (it was $44-47 delivered).
The other thing is I bought a cheap vinyl hose, but may hold off and get a rubber hose instead.

Another thought for those that don't have the torch-borrow one from a neighbor, or get the neighbor to soldier it up for you in exchange for a few homebrews.
I built my CFC using a design identical to Bobby's except I went the cheap vinyl hose route.
Well, ten years later, its still going strong, although I would probably use a better grade of hose if I were to do it over again today.

BTW, very nice tutorial, Bobby.
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Old 04-08-2008, 07:34 PM   #88
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Those 1/2" to 1/4" reducers are a PITA to find... none at home depot, lowes, or the local plumbing supply house... I used an end cap and drilled it out...

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Old 04-08-2008, 07:43 PM   #89
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Interesting. My Lowes had two boxes of 100 or some other obscene number.

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Old 04-08-2008, 08:09 PM   #90
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I was somewhat surprised to find that they didn't have them as well... Only place I found them was mcmaster, but I really wanted to get this beast built. I'll post pic's on the process once I'm done.

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