Eliminating air bubbles

[garyevs]

Hi

I have just built my first water cooling system for my PC. It is

still on the bench running a leak test and not yet installed in

the case.

The components I have used are:

DangerDen Maze 4 waterblock for the P4
Eheim 1250 Pump
DangerDen 1/2" tubing
DangerDen clear reservoir
Black Ice Extreme Radiator

The water flow is set up in the following order:

Radiator > waterblock > reservoir > pump (inlet) > pump (outlet) >

radiator

I think that I have cleared all the air from the system and

everything seems to be working OK.

The pump is suprisingly quiet, but there is still a slight

burbling sound coming from the pump, as if there is still some air

in the system. It seems that due to the high flow rate of this

pump, there is a lot of turbulence being caused in the reservoir.

Even though the reservoir is almost full, it appears that this

turbulence is creating tiny air bubbles which are being sucked

back into the system.

Does this normally happen, or is it due to the design of this

particular reservoir, and if so which reservoir would be better?


Cheers

[fhorst]

Your setup sounds quite OK.

The sound from your pump might be that there is some air at the impeller.
Switching your pump off for a few seconds gives the air the possebility to get out from the pump.

it's a bit the same for the tiny bubbles in your loop.
Once you have your loop running, there is no place for the air to "settle down" leaving it in tiny bubbles. The small bubbles won't disapear, unless you have a place where the flow is low (usaly reservoir)
When the flow is high there also, just shut down you pump, let it "rest" for a few minutes.
You will see that the tiny bubbles will form bigger ones.

Moving your case a little, will make the bigger bubbles go to the highest point : your reservoir. At the reservoir you can let the air out by filling it.

Dangerden clear reservoir does not tell me that much, as they have several reservoirs, the round one, and bay reservoirs.

I have the round one also, and that can give quite some turbulence, but it's real easy to fill/blead, just aslong as you shut down your pump, let the air bubbles rise to the reservoir, and fill it again to the top.

Let us know how it works out!

[Gooserider]

I have seen some discussion (I think one thread involved Phaestus here, but I could be wrong) of turbulence pulling res air into the water flow. One suggestion was to put a sponge or other similar object in the top of the res so that it would break up any vortex action that would pull in air. Theory is that the water would then flow through the res smoothly w/o picking up air bubbles, but still let air seep out if need be. I haven't tried it, but the idea makes sense to me.

Just be sure that the sponge doesn't block the clear path between the inlet and outlet.

Gooserider

[kusojiji]

Fill that res all the way up.