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Old 05-17-2006, 03:26 AM   #1
Chairman Cheyco
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This is nothing ground-shattering as far as CFC's go, but I think it's an improvment on the BYO design. There is a slight increase in cost but I think it's easily offset by the increase in durability and ease of assembly (no JB weld.)

The difference is in how the tees are built, where they used rigid copper tees I swapped them out for threaded tees and hose barbs instead:



BOM:
25' 5/8" garden hose
25' 3/8"OD copper tubing
2- 1/2" NPT female brass tees
2- 3/8"compression x 1/2"male NPT fittings
4- 5/8"hose barb x 1/2" male NPT fittings
4- 5/8" Hose clamps

Tools:
Teflon tape
25/64" drill (you can use 3/8" but that extra 1/64" makes putting it together much easier)
Knuckle-busters (wrenches for the fittings)
Homebrew

Start by cutting about 8" off both ends of the garden hose. Use your guile and get the copper tubing insde the garden hose, it's easier if you straighten both out first.
Next drill out the centers of the compression fittings so the tubing will slide through them. Drill from the 1/2" threaded side to avoid damaging the ferrule seat.
Once you're done that, put thread tape on all the threads and make it look like the picture (don't forget to put the hose clamps on the hoses before you put the barbs in the hoses!)
Tighten everything until there are no leaks and you're done.



With this configuration I can run it under full, shut-in hose pressure with nary a leak, BYO's would blow up if you did that. Since I built it, I have added a ball valve to the cooling water inlet to control the wort temp more accurately (my hose water was running at 35F(!) yesterday so running it wide open is out of the question, just a trickle suffices.)

I hope this is helpful, like I said, nothing groundbreaking, but I feel it's more simple than many of the designs I've seen. Let me know if I missed anything.



Update:
I was going to build a through-mometer the other day out of one of those liquid crystal sticker thermometers, and then I just thought 'why not stick the thermometer right to the discharge side of the CFC coil?' So I did. I had to trim the thermometer down by cutting off the Celcius scale (antiquated system that it is) and then to ensure it stayed-put, I wrapped it with a layer of clear packing-tape.
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Old 05-17-2006, 03:41 AM   #2
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That looks awesome, as does the new avatar!

Thanks for posting the CFC build.
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Old 05-17-2006, 12:47 PM   #3
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Looks awesome...I'm going to try it next week. Thanks for the write up!

 
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Old 05-17-2006, 07:45 PM   #4
davidkrau
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Feb 2006
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Thanks for the info. It looks simple enough to make. You did a great job of explaning the the counterflow. Thanks again.

 
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Old 05-17-2006, 07:53 PM   #5
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Thanks Cheyco. I too plan on building one of these soon and appreciate it.

Quote:
Originally Posted by Dude
That looks awesome, as does the new avatar!
I've just learned that May is International Cleavage Month! I think we all need to do our part and change up our avatars to show our support! Oh, this is not a politically correct event and only includes females. Plumber cleavage is out of the question.

 
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Old 05-18-2006, 02:55 AM   #6
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dude that is home cooked technichal art - I love it
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Old 05-18-2006, 04:33 AM   #7
drost
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Would it be possible to see pictures of how you attached the ball valve? That's a great idea!

 
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Old 05-18-2006, 04:43 AM   #8
Chairman Cheyco
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Actually, the one I used was from a broken watering wand of SWMBO's so it is simply a 3/4" hose connection and you just put it in-line after the hose and before the chiller. I can take a pic tomorrow if you want.
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Old 05-18-2006, 04:58 AM   #9
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Very nice, CC!

If I ever build one of these contraptions, it will be just like yours.

I assume that there is enough clearance for water to flow between the outside of the copper tubing and the hose nipples?

 
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Old 05-18-2006, 05:04 AM   #10
Chairman Cheyco
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Quote:
Originally Posted by Lounge Lizard
I assume that there is enough clearance for water to flow between the outside of the copper tubing and the hose nipples?
There is plenty, tubing sizes are outer diameter (OD) and hose sizes are interior diameter (ID). If you're worried about it you could always go to 3/4" hose and barbs. This may not be a bad idea for those of us who's coolant water isn't near freezing as it would increase the cooling capacity significantly.
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