pump positioning

[iggy]

is there any restriction on which way an eheim 1048 can be placed?

currently im planning on the inlet facing down and the outlet facing sideways, as this is the most space efficient way i can think of (its all going to fit into a pretty enclosed space.)

will this affect the pumps ability at all?

cheers,
iggy

[pauldenton]

Originally Posted by iggy

is there any restriction on which way an eheim 1048 can be placed?

currently im planning on the inlet facing down and the outlet facing sideways, as this is the most space efficient way i can think of (its all going to fit into a pretty enclosed space.)

will this affect the pumps ability at all?

cheers,
iggy

iirc that is the one orientation that's risky (i.e. air can collect around the impellor causing cavitation)

[iggy]

damn, thanks for the quick reply
i see what you mean, just mean a bit more modification

[|kbn|]

The best way is to have the inlet facing up, as it reduces niose and gravity helps the pump with sucking hte water in. You want as little restiction as possible on the pump inlet, thats why the barb on inlet is bigger than the outlet

[Turbokeu]

Originally Posted by pauldenton

iirc that is the one orientation that's risky (i.e. air can collect around the impellor causing cavitation)

Not... The only orientation to avoid is the one with the outlet facing downwards.

I use my Eheim 1250 since years in the orientation as iggy would like to use it:


CD

[pauldenton]

Originally Posted by Turbokeu

Not... The only orientation to avoid is the one with the outlet facing downwards.

I use my Eheim 1250 since years in the orientation as iggy would like to use it:


CD

ah - my bad (i knew it was one or the other...)

p.s. i see you're not scared of using elbows in your run ...

[Turbokeu]

Originally Posted by pauldenton

ah - my bad (i knew it was one or the other...)

p.s. i see you're not scared of using elbows in your run ...

No worries.

No, I'm not...
It's so easy to route your tubing and make your fill&bleed. The copper turns are 15mm OD - 13mm ID (1/2"), the PVC parts are 20mm ID (3/4").
With all the the elbows (11 !) in my setup I had a flow of 4.40LPM with my Maze3, and now 3.35LPM with my Cascade WB (remember that I use also a very restrictive AquaCoil II cube rad).
Not bad is my GF4400 (3 copper turns) and my digital Swissflow sensor which ID is 3/8".


The black part is the Swissflow flow sensor:


Overview in an earlier (unfinished) state:


CD

[iggy]

thanks for your advice guys
sweet setup btw, do you have a project log on that res?

*edit* never mind, i found it

[TallTxnMo]

Trubokeu,

What rad is that? That looks perfect for my narrow a$$ case.

[Turbokeu]

Originally Posted by TallTxnMo

Trubokeu,

What rad is that? That looks perfect for my narrow a$$ case.

When I started my watercooled Lian Li PC-70 project back in june 2001, cube rads like this one were very common.

There was the "famous" (in a bad way) 3/8" Danger Den Cube, and the 3/8" BeCooling AquaCoil. The AquaCoil received a "lifting" afterwards by dividing the 20 water passages in two circuits of 10 passages in parallel, halving the flow restriction, and also by changing the in & output to 1/2", named the AquaCoil II .
This is the one I bought in july 2001.

I never regretted it (although I have no experience with "heatercore" style rads). I like the way they integrate into computer cases (they are made for computer cooling, and it fits my PC-70 perfectly), very square with all needed mountings for the case and the fan.
They are small (almost the dimensions of a 120mm fan) but deep, favorizing thermal transfer but also adding more resistance to the air flow. Tubing is completely made of copper, fins are made of aluminium.

Cool-Computers still sell this kind of rad (last rad in the page).
The one in the link resembles very, very much to my Aquacoil II, two parallel waterways with 1/2" connections. BeCooling stopped the commercialisation of the AquaCoil about 1.5 years ago.

One thing I observed is that my cube rad seems to accomodate with very low airflows.
My AquaCoil II is very happy with a Panaflo M1 running at 6.5V, boosting the fan to 12V results in CPU temp decrease of less than 1°C, where owners of heatercore rads report better results with higher airflows (or even push-pull fans).

I'm also aware of the fact that they represent a high water flow restriction, but nothing a "powerfull" pump can overcome. My Eheim 1250 achieves 3.35LPM through the AquaCoil II, "the" Cascade WB , a DD GF4 WB, a restrictive digital flowsensor and a lot of sharp 15mm 90° copper bends...

And guys, before flaming me about using a cube rad, I KNOW heatercore style rads have better thermal transfer and are less restrictive...

CD