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  #41 (permalink)  
Old July 11, 2007, 07:25 PM
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Nope, no problem here. No need for teflon tape, the o-ring will take care of the seal. When you'll install the barbs, just be careful to put too much torque on them. When you'll see the o-ring compressed, it's enough.

And always perform a 24hr leak check.

John
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Old July 11, 2007, 07:31 PM
JayDee
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Cool! Thanks 3.0charlie :)

While I was researching my H20 system I read that one guy recommended using Isopropyl alcohol in the system first to flush/clean out the system. I could see it also killing any organisims in the loop that might grow algae later on... I might try that.
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  #43 (permalink)  
Old July 11, 2007, 07:43 PM
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Quote:
Originally Posted by 3.0charlie View Post
Nope, no problem here. No need for teflon tape, the o-ring will take care of the seal. When you'll install the barbs, just be careful to put too much torque on them. When you'll see the o-ring compressed, it's enough.

And always perform a 24hr leak check.

John
I'll second and third that one!!!!!!

I suspect overtorquing the barbs into my TT CPU block (I know... don't laugh.... :) ) is ultimately what caused the acrylic top to crack and leak all over my old (fried) 1950pro.
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  #44 (permalink)  
Old July 11, 2007, 07:58 PM
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Highly possible. As soon as you see the o-rings starting to compress, it's almost enough torque. There's hardly any pressure in a wc system. A lot of flow, but no pressure.

Last edited by 3.0charlie; July 11, 2007 at 08:05 PM.
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  #45 (permalink)  
Old July 11, 2007, 08:05 PM
JayDee
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Quote:
Originally Posted by 3.0charlie View Post
When you'll see the o-ring compressed, it's enough.
From what I've seen I plan to tighten all the barbs by hand and then give them 1/2 turn with a wrench to finish.
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  #46 (permalink)  
Old July 11, 2007, 08:11 PM
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Using the Swiftech barbs (plastic), I found that it's hand-torque + 1 turn. But since you'll be using metal barbs, it will be different. Probably less - 3/4 turn. Looking at the o-ring, you'll know when to stop.

John
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  #47 (permalink)  
Old July 11, 2007, 11:02 PM
Misoprostol
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please do not use isopropyl alcohol in your loop. That is a terrible idea. It can break down reservoir glue, reduce the lifespan of O-rings and other nasty stuff.


As for how tight to do barbs, it depends on your blocks (I haven't bothered to read back). If you have Swiftech barbs, usually you can go ahead and crank them as tight as they'll go. Same with the FuZion. Danger Den blocks require you to ease up a bit but it's not a big deal


Basically what I do is I take a scrap of Tygon tubing put it over the barb and use that to grip it, then tighten it 'til I can't anymore. It's usually easy to get it tight enough that it will not come off.
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  #48 (permalink)  
Old July 12, 2007, 03:56 AM
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Quote:
Originally Posted by Misoprostol View Post
please do not use isopropyl alcohol in your loop. That is a terrible idea. It can break down reservoir glue, reduce the lifespan of O-rings and other nasty stuff.
Thanks for that Misoprostol :)
*no Isopropyl*
I was only going to use it for an initial flush of the system and not for actual use in cooling it but I will avoid it :)
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  #49 (permalink)  
Old July 12, 2007, 04:55 AM
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Quote:
Originally Posted by Misoprostol View Post
please do not use isopropyl alcohol in your loop. That is a terrible idea. It can break down reservoir glue, reduce the lifespan of O-rings and other nasty stuff.


As for how tight to do barbs, it depends on your blocks (I haven't bothered to read back). If you have Swiftech barbs, usually you can go ahead and crank them as tight as they'll go. Same with the FuZion. Danger Den blocks require you to ease up a bit but it's not a big deal


Basically what I do is I take a scrap of Tygon tubing put it over the barb and use that to grip it, then tighten it 'til I can't anymore. It's usually easy to get it tight enough that it will not come off.
If you want to flush, just use distilled water first, then flush / fill with the coolant stuff.

On all barbs (including the DDs and Swiftechs), there is a hex nut (9/16" if I remember well) to torque it. I use that.
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Old July 15, 2007, 03:48 AM
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If you really want to clean your loop out, just mix a 10% viniger and 90% distilled water mix, then run it in your loop for a few hours.
Then flush it out 1-2 times with distilled water.
That will get all the "muuk" out of there.

I do it about once every 3 months.
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