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Looking for wisdom on res/pump order

post #1 of 9
Thread Starter 
Hi,

I'm planning a new watercooled build inside a case without much space.
Even though I know it is highly recommended to put the reservoir directly before the pump, I was wondering if something like this would work :

In this setup, If I understand fluid dynamics correctly, as long as I keep my bay reservoir filled, the pump should always be fed, no ?
I'd love your input on the matter guys !

Cheers.
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post #2 of 9
It will be a bit harder to bleed. But you should be ok,
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post #3 of 9
Sorry, your loop is DOOMED. tongue.gif

Not really if it Is possible to have the RAD fittings on the bottom facing the pump inlet. If so, then INDEED you can get by with your loop configuration. If not, then the coolant in the RAD can not overcome gravity to load the pump. The pump will starve and burn up.
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post #4 of 9
Quote:
Originally Posted by bmaverick View Post

Sorry, your loop is DOOMED. tongue.gif

Not really if it Is possible to have the RAD fittings on the bottom facing the pump inlet. If so, then INDEED you can get by with your loop configuration. If not, then the coolant in the RAD can not overcome gravity to load the pump. The pump will starve and burn up.

This does not make sense to me. Once the loop is running, there is pressure behind the liquid in the rad pushing it out to the pump. That is just logic, I have no empirical data.
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post #5 of 9
As long as the pump is primed it doesn't matter where it is located. The first few minutes of bleeding will be difficult but after it is bleed you'll be fine. Might just have to tip your case around a bunch when you first start to bleed.
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post #6 of 9
Thread Starter 
Hmmm, thanks for your answers so far !
I still have some doubts though, I may test this with a cheap-ass pump and see what happens.
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post #7 of 9
Hmm...

i mean, i guess technically, the res is above the pump...

but it would be best to have the res go directly to the pump then to the rad...
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post #8 of 9
Radiators have a tendency to trap bubbles of air in them. But after running the loop for a while (and often some helpful rotation/shaking of the radiator) these bubbles will get pushed out of the radiator.

The only issue with your setup is that those bubbles of air will get pushed down to the pump. This isn't ideal, but a pump isn't going to break in the second or two that it takes for the bubble to get pushed through the pump. Mainly you'll need to be quite careful initially as you fill the system and make sure the pump is getting water as much as possible. So as others mentioned it will make bleeding a bit more difficult, but by no means impossible - after all some people run loops without a reservoir.
post #9 of 9
The trick would be to shake the rad so that some of the water spills over to the pump's feed and gets rid of any large air bubbles. Its not the safest way to do it since a large air bubble can cause damaging cavitation, but its pretty unlikely.
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