Is using the top port of a reservoir in combination with an extra reservoir bay possible?

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kcinkcinkcinnick

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Dec 18, 2014
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Hy,

I'm putting together a watercooling circuit for my pc.(This is my first watercooling build)

I have the Coolermaster 935 stacker(comes with a 915r) case with an extra 915. So a small 915 on the bottom, the main case and a small 915 on top. In the lowest 915 I have 1 360 radiator and my pump, cause it wouldn't fit in the 935 middle.
On the top 915 it's just 1 360 radiator.

This is the circuit I'm planning:

Reservoir bay - reservoir - pump - bottom radiator - gpu1 - gpu 2 (parallel) - top radiator - cpu - back to reservoir bay.

Everything I got is from EK wb. I got the x360 kit with extra waterblocks for 2 GTX 970's and a bay.

I'm planning on using the reservoir bay for filling, draining. (it has a hole on top). The bay as you probably know is where other optical drives should go and the other reservoir is between my mobo and the hdd/ssd tower (like everyone does it I guess).

The normal reservoir has 1 top hole, 2 horizontal and 2 vertical holes. I was going to connect the out-port from the reservoir bay to the top port of the reservoir and connect the bottom port of the reservoir with the in-port of the pump. I've read the instructions and I know it says the top hole is only for filling/draining, but I think they only mean it if you got only 1 reservoir.

My guess is that if I start filling the bay water goes down trough the reservoir and goes to the pump. When adding more the level will rise and fill up the normal reservoir. (I will be moving and tilting the cage so there's (hopefully) no air trapped in the reservoir).

I've read something that this could give a lot of pressure on the reservoir. Could there be? What I understand of liquids etc. is that if there is an even flow an equal amount of water comes in the reservoir trough the top port and an equal amount of water comes out the bottom port. Isn't this almost the same as using parallel on multiple gpu's?

Please correct me if I'm wrong, I'm just saying what I think would happen. I'm unexperienced on watercooling so yeah ;).

Thanks for reading ;)

-kcinkcinkcinnick
 
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Deuce65

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Oct 16, 2013
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There is no reason to have two reses. First, you obviously can't use it for draining as it is at the top of your loop! As for which ports to use, generally speaking you want to follow the instructions the manufacturer put there. If they say not to use it as an inlet, don't use it as an inlet. The primary purpose of the res is to remove air from the system; if you use a port as an inlet that wasn't designed as an inlet it may not bleed properly or worse, actually force air into the loop.
 
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kcinkcinkcinnick

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Dec 18, 2014
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The normal reservoir is just for the looks so :s
Do you mean that I can't use the reservoir bay as a draining port? The bay isn't the highest point of the loop. The top radiator is the highest point of the loop.

If you look at as a enlargement of a normal tube. First the small tubing, enlarged in a bigger tube ( the serervoir) and then getting back to the small tube.

Also if I don't use the top port but a horizontal port and a vertical port in the reservoir, should this work?

For the draining part. With my loop if i would not use a bay reservoir I would need too fill my loop with the top port of the reservoir. But how about draining? If I loosen the plug of the top port should the water come upside down and spill? Or does it stay still in the reservoir? Maybe I should know this but I don't :s
 
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kcinkcinkcinnick

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Dec 18, 2014
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Hmm, I'll guess i'll be holding my pc upside down then :s since my pump and radiator are the lowest point :s Thanks for helping :)

I'm still wondering if I shouldn't use the top port but I use 1 horizontal and 1 vertical (the vertical is directly above the pump's in port) there would be a big vortex is my guess :s
 
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