Does a 1/2" immersion chiller really work better than 3/8"? - Home Brew Forums
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Old 05-11-2008, 07:11 AM   #1
Tankard's Avatar
Oct 2007
Santa Barbara
Posts: 712

39.69 for 50 feet of 3/8" copper tubing on The 1/2" is $49.99. Is it worth the extra $10 to get the 1/2"? Does it speed up the wort cooling time at all? I watched Bobby M's video and I don't really feel like boring out the garden fittings to make it fit 1/2", it seems like 3/8" would work better in that regard. Any comments?

I only need a wort chiller now and then I'll have everything necessary to brew all grain!!!!

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Old 05-11-2008, 02:08 PM   #2
mrfocus's Avatar
Oct 2007
Montreal, Canada
Posts: 573
Liked 3 Times on 3 Posts

Well, 50' of 3/8" copper gives you 0.456m^2 of surface area.
50' of 1/2" gives you 0.608m^ of surface area (sorry I'm used to the metric system). Or 33% more surface area for the same length.

As to whether it changes cooling times significantly, I have no clue.
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Old 05-11-2008, 03:47 PM   #3
Nov 2007
Posts: 23

the simple answer is yes.
I upgraded to 1/2 and it cut my cooling time in half.
$10 well spend IMHO

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Old 05-11-2008, 04:05 PM   #4
amishland's Avatar
Dec 2007
SE Michigan
Posts: 399
Liked 1 Times on 1 Posts

I bought the 3/8" from Coppertubingsales and ended up just buying a bender and soldiered on some garden hose fittings and some stiffening points, I am proud of it, and it works great, I get from 212* down to 65* in about 5-6 minutes.

If I had the chance to do it again I would buy the 1/2", looks better, stiffer when built right, and will be better when I graduate out of 5 gallon batches and start doing 10+ gallon boils. bobby's video makes building it easy as well.

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