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Old 01-22-2009, 09:15 PM   #1
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Default Wort Chiller w/ice water bucket - How big a pump?

I am going to build a copper coil wort chiller that uses a bucket with ice water instead of the faucet. It will be made of about 20 or 25' of 3/8" tubing.

How big a submersible pump do I need?

I am looking at a little one at Harbor Freight. It pushes 165 GPH, has a 47" lift and a 1/2" outlet.

Assuming a 20 minutes chill with 5 gallons of water, that would be about 11 cycles.


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Old 01-22-2009, 10:02 PM   #2
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I use an aquarium pump for undergravel filtering. Not an extremely high gph. Slow enough that the ice melts really quick from really good heat transfer.


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Old 01-22-2009, 10:06 PM   #3
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I just use one of those little pumps that goes on an electric drill worked great and was 9 $I have found that the slower the water goes in the IC the more heat transfer. Next time Try this run it at full blast then throttle down the water . The outlet water gets hotter
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Old 01-22-2009, 10:24 PM   #4
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I tried one of the $10 harbor freight pumps. The POS didn't work, I'm not positive about the GPH, but it was around 200 I believe.

I bought a $35ish pond pump from Lowes, I think it's 300 GPH, and it works great. The harbor freight pump is garbage.
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Old 01-22-2009, 11:17 PM   #5
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My Harbor Freight pump works like a champ with my CFC...
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Old 01-22-2009, 11:20 PM   #6
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I used a harbor freight pump, too. It worked very well. Instead of recirculating the water back into the reservoir, I moved it to a drain. It didn't make sense to me to warm the cold water. Just keep filling the reservoir with cold water as needed.
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Old 01-23-2009, 12:25 AM   #7
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this thread is worthless without pics

I am curious to see what this looks like and the fittings etc.
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Old 01-23-2009, 12:52 AM   #8
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I use an immersion chiller. first i use hose water, then recirculate ice water with the 145 gph harborfreight mini submersible pump. That thing works great!
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Old 01-23-2009, 06:09 PM   #9
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Quote:
Originally Posted by Duckfoot View Post
My Harbor Freight pump works like a champ with my CFC...
I bitched about the flowrate on mine when I bought it(supposed to be 195GPH), but now that I've used it, it's great.

6 gal. of boiling wort down to 60F in 30 minutes.
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Old 01-23-2009, 06:39 PM   #10
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Quote:
Originally Posted by jtd_1 View Post
I use an immersion chiller. first i use hose water, then recirculate ice water with the 145 gph harborfreight mini submersible pump. That thing works great!
Exactly what I use and do. Works well


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