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Air in my resevoir?

post #1 of 15
9/9/12 at 12:04pm
Thread Starter 
Hi Everyone,

I'm pretty new to the water cooling scene. A couple months ago I built my water cooled system.

Loop config:
RES/PUMPS > CPU > Motherboard > RAD1 > GPU1 > GPU2 > GPU3 > RAD2 > RES/PUMPS

2x 3x120mm 11-FPI Copper

My reservoir is a Koolance RP-401X2 with two PMP-400 in a series setup using the RP-401X2 to connect the two reservoirs.

System has been running fine for over a month, I believe I bleed the system of all air properly. But yesterday I thought I heard some gurgling from the reservoir and today I did for sure and now I notice that I have some air/bubbles and condensate in the reservoir.

To me, I have one of the following issues:
  1. I have a leak
  2. Its sucking in air from somewhere
  3. It was air that was still trapped in the radiators

I've looked for leaks, all my connections are made with 1/2 OD compression fittings - I have been checking these regularly as I was told to because of thermal expansion of the tubing (Clear UV-Reactive PVC, 13mm x 19mm (1/2in x 3/4in)) but I do not see any leaks.

How do I find out where it would be sucking in air? Where is the most likely locations? I've checked the connections on the back of my reservoir and it looks and feels air tight to me.

If the air was just trapped in the system somewhere - really, this could be a non-issue and it will continue to work itself out, right?
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post #2 of 15
9/9/12 at 4:29pm
I dont fully understand the question.
Quote:
I have a leak
Then you would see coolant somewhere. I would not consider a res that is not airtight as a leak.
Quote:
Its sucking in air from somewhere
Maybe from the res. If it would suck air somewhere else you would rather see coolant dripping out than air going in.
Quote:
It was air that was still trapped in the radiators
Should not be an issue. Just re-bleed. Let the air escape.
In this pic you see some air above the coolant. No issue even if it would have been "sucked in".
This loop was filled some hours ago - hence the small bubbles.
There is also some condensate. I do not worry about that since there is no way to stop it.


I hope this helps a bit - as I wrote I didn`t get the question because to be honest I never heard/read that a loop has to be air tight.
Rather watertight tongue.gif
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post #3 of 15
9/9/12 at 10:13pm
To me, I have one of the following issues:

1.I have a leak NO

2.Its sucking in air from somewhere NO

3.It was air that was still trapped in the radiators YES
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post #4 of 15
9/10/12 at 7:43am
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Quote:
Originally Posted by Gawlron View Post

....
I've looked for leaks, all my connections are made with 1/2 OD compression fittings - I have been checking these regularly as I was told to because of thermal expansion of the tubing (Clear UV-Reactive PVC, 13mm x 19mm (1/2in x 3/4in)) but I do not see any leaks.
.....

Can you verify this please? you say you are using 1/2" OD fitting but are using 1/2" ID-3/4" OD tubing?

I hope it is just a small typo and the air you see is just from the radiators.
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post #5 of 15
9/10/12 at 7:52am
It was a typo on his part. As if that was the case he would have more then a small amount of air in the system at this point. Seems you just have some trapped air in the rad. Just make it surge and tap the rad while rocking the case front to back. Then side to side. Thanks
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post #6 of 15
9/10/12 at 10:56am
Thread Starter 
@Mr.Eiht your explanation made perfect sense to me.
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post #7 of 15
9/10/12 at 10:57am
Thread Starter 
Quote:
Originally Posted by Cord78 View Post

Can you verify this please? you say you are using 1/2" OD fitting but are using 1/2" ID-3/4" OD tubing?
I hope it is just a small typo and the air you see is just from the radiators.

Ha... yeah, 3/4" fittings on my 3/4" OD tubing. Sorry... was drinking.
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post #8 of 15
9/10/12 at 10:58am
Thread Starter 
Thanks for all the advice, sounds like its nothing to worry about.
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post #9 of 15
10/1/12 at 1:20am
Thread Starter 
So, I've bleed it again and topped it off... but after topping it off - now I'm wondering if maybe there should be a little bit of air in the res...
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post #10 of 15
10/1/12 at 1:51am
Quote:
Originally Posted by Gawlron View Post

So, I've bleed it again and topped it off... but after topping it off - now I'm wondering if maybe there should be a little bit of air in the res...

Air will get in ther if there is still some in the rads. Its not an issue to top it off.
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