90° fittings slow down waterflow?

AciD_RaiN

New member
Hey guys, I recently heard that using 90° fittings and straight hoses is less efficient then using straight fittings and make the hose go in a loop. I can't find any proof of that so I was wondering if you could help me out
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I've never watercooled but i believe as long as you have a decent pump with good flow rate, there shouldn't be any difference
 
I've never watercooled but i believe as long as you have a decent pump with good flow rate, there shouldn't be any difference

What the dancing banana said
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Probably does slow the flow slightly but i'd say it's barely noticeable.
 
if anything, 90 degree barbs/compression fittings actually improve the waterflow slightly as it means the amount of hosing you have to use to reach the components is reduced, it also means your loops will be much neater and straighter in terms of point to point, so your best going for angled fittings where you can
 
if anything, 90 degree barbs/compression fittings actually improve the waterflow slightly as it means the amount of hosing you have to use to reach the components is reduced, it also means your loops will be much neater and straighter in terms of point to point, so your best going for angled fittings where you can

This is the answer I wanted to hear
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Is there anywhere I can have some proof of that? This is what I believe but I always need something to show to prove I'm always right
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http://www.youtube.com/watch?v=hblwVbnjHxU&list=UUVvMuzFlt3VfF1GR4Wfu4DQ&index=2&feature=plcp

bout all i could find at such short notice. I would give you pics of my own rig, aside from the fact that im mid transfer across to my new rig, and as such, my own watercooling loop has been removed recently whilst waiting on new parts!!! but ive used angled fittings before, with no issues at all (barring 1 dodgy fitting i got that leaked, but that was a manufacturing fault not a fault of the type of fitting used
 
Each 90 elbow is actually the equivalent of about 4 ft of tubing I'm afraid. There is a thread on xtremesystems about it. I'm not sure what the deal is about linking other forums, if it's all good then I will link it for you.

so yeah, if you have them on your cpu then again on your gfx card it adds the equivalent of 16ft of tubing!!

So this goes against what nearly everyone else said here haha, but the thread has tests and data to back it up I'm afraid.

On the other hand, in my new build I am going to be using LOADS of them, I just hope my 2 D5 pumps will keep up!
 
It seems a bit extreme (no pun intended) that one 90 adds up to 4ft of tubing.

With a good pump like a D5 I don't see it being a problem though. The Snowdrift build Tom did for the Gadget Show used a few 90's and 45's and that run ok off a XSPC drivebay res with a DDC.
 
It seems a bit extreme (no pun intended) that one 90 adds up to 4ft of tubing.

With a good pump like a D5 I don't see it being a problem though. The Snowdrift build Tom did for the Gadget Show used a few 90's and 45's and that run ok off a XSPC drivebay res with a DDC.

What I want to know is why would it slow down the flow? The fittings are wide open end the corners inside are quite smooth but if you use straight fittings and longer hose the water has to travel a longer way. I donðt know much about the pressure and all that though... I just need to see some evidence or from a well known and reliable source...
 
What I want to know is why would it slow down the flow? The fittings are wide open end the corners inside are quite smooth but if you use straight fittings and longer hose the water has to travel a longer way. I donðt know much about the pressure and all that though... I just need to see some evidence or from a well known and reliable source...

I don't have any first hand experience with using 90s and it would probably be worth looking at the thread Jack was on about on Xs, should be fine to post it by the way Jack.

I would have thought it would slow the flow down slightly but not enough to effect performance with a pump like the D5. Like I said above Tom used a DDC with Snowdrift and that had about 4 90's and a few 45's so if there was no problems with running that with a DDC I don't think there would be any issues with a D5 for your rig.

As I said though I have no personal experiencing with it but i'm pretty confident you would be ok.
 
if anything, 90 degree barbs/compression fittings actually improve the waterflow slightly as it means the amount of hosing you have to use to reach the components is reduced, it also means your loops will be much neater and straighter in terms of point to point, so your best going for angled fittings where you can

neater, yes..

90° fittings because of the short side radius are very restrictive. but, because of the compartment restraints,

they are what they are. cross-sectional value is 8-14% restrictive due to their compact way of changing direction.

the actual flow aperature is an oval, not a circle in the apex of the fitting. thus, the area is decreased in size.

as in air-flow the tighter the bend in the tubing the higher the restriction. the looser the radius in the bend the

smaller the restriction. the scale of this is small, but a small restriction is amplified due to the size of the parts

involved. does it hamper the cooling capibilities, no. does it increase of decrease temperatures, no.

so to have a less restrictive system, the straight barb and large loop is more advantagious than the 90° fitting.

but because to the small compartment, this sometimes can not be useful in remaining tidy.

airdeano

(* manufactured and designed air intakes and exhausts for automobiles and port-flowed cylinder heads for 22years)
 
I have recommended this in another thread if you would like to do the math for your whole loop.

(Can be a bit tricky to navigate at first)

http://www.pipeflowcalculations.com/

(Hint) In the bottom left hand corner of page with the calculator you want there is a button that says "click here to start calculator."

if anything, 90 degree barbs/compression fittings actually improve the waterflow slightly

^^^I LOLd pretty hard at this^^^
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They do slow the flow down how ever when your system reaches equilibrium it makes not an once of difference unless your using a special liquid that relays on flow rates.
 
[media]http://www.youtube.com/watch?v=hblwVbnjHxU&list=UUVvMuzFlt3VfF1GR4Wfu4DQ&index=2&feature=plcp[/media]

bout all i could find at such short notice. I would give you pics of my own rig, aside from the fact that im mid transfer across to my new rig, and as such, my own watercooling loop has been removed recently whilst waiting on new parts!!! but ive used angled fittings before, with no issues at all (barring 1 dodgy fitting i got that leaked, but that was a manufacturing fault not a fault of the type of fitting used

That rig looks fucking aweful!
 
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