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Reservoir placement and size

post #1 of 10
Thread Starter 
So I was thinking earlier, what happens exactly when you place a small reservoir on top of your pump, on the bottom of the case.

When you shut off your system and the pump stops running, will the water from the tubing/radiators at the top part of the case go back down and fill up the radiator to its max?

If so how exactly do you fill the loop (since you have to power the pump on and off with the reservoir open)?
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post #2 of 10
Quote:
Originally Posted by Daredevil 720 View Post

So I was thinking earlier, what happens exactly when you place a small reservoir on top of your pump, on the bottom of the case.

When you shut off your system and the pump stops running, will the water from the tubing/radiators at the top part of the case go back down and fill up the radiator to its max?

If so how exactly do you fill the loop (since you have to power the pump on and off with the reservoir open)?

A pump with a built in res if thats what you mean is just like any other res minus tubing going from the res to the pump. Once the system is filled so everything has water in it, you are done, except for maintenance and topping off. The only thing that will need water added to is the res. A res needs to be above the pump so you don't run the pump dry. This is the same if you use a drive bay res or a stand alone. Filling is done into the res through some kind of fill port on the res. I hope i am giving you the info you need and not confused by what you are asking.
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post #3 of 10
Similar to what Watagump said, as the pump is sucking the water from the reservoir, all the waterblocks and radiators are being filled. Once every component is filled, you'll finally be able to top off your reservoir with what ever coolant your using. The only reason people top off tube reservoirs (besides aesthetics) is to prevent air bubbles from developing as the water is being rushed in from your components. Turning off the pump is not going to rush water up the reservoir.
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post #4 of 10
Thread Starter 
Maybe I wasn't clear enough.

When the pump turns off, what keeps the water in the upper part of the case from flowing back down and filling the reservoir? Does the pump block fluid movement when it's off?

In other words, does the water level in the radiator rise when the pump turns off or does it stay still, regardless of its placement?
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post #5 of 10
The small amount of air stuck in your loop is causing it. It's kind of like when you put your finger on the top of a straw and then pick it up. The fluid remains in the straw because there is force pushing up on the water and nothing pushing down.
 
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post #6 of 10
Thread Starter 
With the reservoir lid closed, the air trapped in it will block fluid from filling it up, I get that, but once you open that lid it's like you're releasing your finger from the straw, the fluid should be free to move as gravity says.

That's why I'm confused...
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post #7 of 10
Good ol Physics. A class I never took.

Does it have anything to do with air not being able to penetrate through the coolant that is topped off in the reservoir? If I was to stick a straw in the coolant, and blow air into it, maybe this would cause it to rise...I don't know. (Hopefully this makes any sense at all)
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post #8 of 10
Its got nothing to do with the reservoir being sealed or trapping air. Simply put for water to flow down from a top mounted radiator into a lower mounted reservoir it would have to draw up an equal volume of water from its input side, normally hanging down towards the CPU or GPU but it doesn't matter. Because the water flowing down would need to lift water up to replace it everything is in balance.

If you opened a port on the radiator itself that is completely different, air can then replace the water going to the res and if your res was open it would over flow.

As mentioned in the OP if water was constantly backflowing it would be very difficult to fill and bleed most systems.
Edited by Jakusonfire - 6/8/13 at 8:28am
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post #9 of 10
I think what OP doesn't know is that the loop is completelly filled with water, without any (well a bit but not really much) air in it, which makes it so there's no need to worry about that.
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post #10 of 10
Thread Starter 
Well I guess I'll have to do it myself to completely understand it, but you guys gave me the general idea!

It'll be a good 3-6 months before I build my own loop, but I'm trying to educate myself in the meantime to get it right the first time! thumb.gif
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