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Water evaporating through top of bay res?

post #1 of 8
Thread Starter 
So a couple of months ago I've upgraded my system with a custom loop and everything has been splendid since then (you can find the part list/build log here). However, recently I noticed the water level in the bay res (EK-DBAY D5 vario) has been dropping ever so slightly. Obviously went on a witch hunt for a possible leak but couldn't find one for the life of me...

But yesterday I did notice some dark patches around the screws which hold on the acrylic front plate (pictures of this can be found on this imgur link) which look like there is water between the front plate and the rest of the reservoir. Now, the res is not filled all the way to the top (as there is a max level indication on there) so the only way water can get there is through evaporation (and possibly some capillary effect). Has anyone seen this before and if so, to what extend is it dangerous for the hardware?

I've tightened these screws a bit (just a couple of degrees as I don't want to damage the acrylic front plate) and am monitoring water levels daily to ensure it doesn't get too low. To me it'd seem that as long as it's evaporating through the top, there is not too much risk for the hardware (as long as it's not spreading, which actually might happen now that I think about it) but I'd like to know what you guys think about this.

Thanks!
post #2 of 8
Hmmm, its a little hard to tell from pics but there should not be any fluid outside that main oring on the front, it should be air tight.

Are you sure it is not just an optical illusion? Could it just be that the acrylic is forced against the acetal there by the screws?
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by Jakusonfire View Post

Hmmm, its a little hard to tell from pics but there should not be any fluid outside that main oring on the front, it should be air tight.

That's exactly what I'd expect as well, but I'm quite sure these spots weren't present until recently (if it'd be due to the contact between the acetal and the acrylic they would have shown from the beginning). Besides, in the beginning, I had these tiny condensation drops all over the part of the acrylic window which was above the water level as you'd expect since the air there would be saturated with water vapour. And now these don't form any more, which seems to indicate a new equilibrium.

Maybe another thing that might be important: the seal consists of two parts of rubber with a groove in between (so section wise, it looks probably something like this). From day one condensation formed inside this groove, mostly at the top. I didn't think much of it at the time since it was not much and that's probably why they had the dual seal anyway, but this has also decreased significantly recently.

All of this now makes me think that the seal isn't as air tight as it should be and water vapour has been working it's way out from the beginning...
post #4 of 8
I don't have any experience with EK bay reservoirs. I just assumed that was a normal oring like other bay res I have used. I would be tempted to take it apart and check everything.
It seems like any fluid escape could only be small so not really a danger or problem but it really should be air tight.

It does look a bit like this though

Edited by Jakusonfire - 9/23/15 at 3:17am
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post #5 of 8
As long as you don't see any water where water shouldn't be, there isn't much cause for concern.

A loop will lose coolant over time because of how porous tubing is as well as fittings leaking very slowly.

I would contact EK about what appears to be condensation near the screws at the top of your bay reservoir like you mentioned. I doubt anything is wrong since you haven't noticed any amount of coolant and the acrylic doesn't appear to be damaged. Still, I'd send them an e-mail and see what they say.
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post #6 of 8
You could try using a very light coat of Dow high temp vacuum grease on the o-ring. It's mainly used for aviation applications but I use it for everything else as well that has o-rings, guide pins, you name it. Maybe try that to see if the issue persists as it never harmed any of my acrylic or acetal. Easy to clean off when you're done as well.
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post #7 of 8
That just looks like condensation to me, I always had condensation in my EK tube res, fluid levels always were fine.
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post #8 of 8
Thread Starter 
Thanks everyone for the responses.
Quote:
Originally Posted by Jakusonfire View Post

It does look a bit like this though
-snip-

You might actually be right, it does look very similar... Guess I'm probably worried about nothing. If it doesn't appear to get worse it's likely just some slight evaporation through the tubing or the fittings (got some elbows in there). Either way, I've got a drain/refill scheduled for next month, so I'll make sure to take a closer look at the res then.

Thanks guys! thumb.gif
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