Compression fittings, is it supposed to be very hard to get on ?

[ptrout]

Or am I doing it wrong ?

Using 2 pliers to get compression fitting outer ring to fit seems like I might be doing something wrong.

I am using Jab-tech Masterkleer 7/16 ID 5/8 OD tubing

with some koolance and banana power compression fittings.

http://farm4.static.flickr.com/3563/3770745708_e6955a9ce6.jpg
Is this supposed turn until its sits flush with the bottom ring ? Not sure I can turn it anymore I might have to use channel locks.

http://farm3.static.flickr.com/2457/3770745672_fa49f7ed51.jpg
Near is a Koolance 5/8 OD and wont turn any further.

Far is the Koolance 3/4 OD and its turn all the way flush to the bottom, but alas it doesnt seem to grab the tubing.

I can run all of this with just bard, 7/16 over 1/2 ID seems make a tight seal , no leaks on loop test so far.

Its it supposed to be this hard get compression fittings to fit ?

thanks for helping out.

[millertime359]

They are a bit difficult to fit on. The 3/4 OD are the worst. I don't think they have to go down all the way, but I wouldn't be putting pleirs on them. My 3/4s are sitting about as far down as yours right now, and my leak test is going well. I got my 7/16 down further, butthey a bit easier to turn.

[HoosTrax]

I use Durelene 7/16" ID 5/8" OD tubing, along with the same ID and OD BananaPower compression fittings. No experience with Koolance ones yet. I can usually finger tighten them until there's about a 1mm gap between the two parts of the fitting. You might find them easier to turn if you dip the tubing and/or screw-on fitting in some isopropyl alcohol first.

(You can't use 1/2" ID 3/4" OD compression fittings on that tubing.)

What fans are those btw...the new Scythe Gentle Typhoons? How do you like them (noise, etc)?

[Utnorris]

As long as the tubing is made for the compression, i.e. 1/2" ID, 3/4" OD tubing for the same size of compression fitting, then finger tight will be enough to create a seal. The only time you would ever need channel locks would be if the tubing was the wrong size.

[ptrout]

Thx guys....

So far using 7/16 with really no outer ring, just tight seal over the barb part and no leak so far in leak test. I tried a couple of more attempts at it, and its really not working out for me. Koolance 90's are the same story, I could barely get the outer ring to fit over the tube.

Going to try something tomorrow. I am going to use 3/4 OD over 5/8 OD tubing, but use some washers as the compression ring, and the outer ring acting as a hold downs of sorts.


Yes, those are 6 gentle typhoons push/pull on TFC 360. I am floored by their noise to performance ratio. I took my fan controller out as at full 12v they are barely audible at 5 ft away, and its a gentle hum sitting next to it. It also pushed decent amount of air, and has enough static pressure to get through low FPI rads. I tested ran ap-15 vs sythe sflex g's and I went with GT AP-15's

[HoosTrax]

Btw, those look an awful lot like the Black Sparkle 45 degree rotaries...

...the same ones I wanted to get from PPC, except someone bought them all :mad:.

[Waterlogged]

If you use 7/16" I.D. x 5/8" O.D. tubing, you must also use compressions that are the exact same size. Koolance does not make any 7/16" compression fittings at all. Mixing tubing and fitting sizes will only lead to problems like improper tightening nut, possible tubing damage, and leaks. Also do not swap the fitting nuts either trying to get a match as this will also lead to some of the same problems.

[ptrout]

If you use 7/16" I.D. x 5/8" O.D. tubing, you must also use compressions that are the exact same size. Koolance does not make any 7/16" compression fittings at all. Mixing tubing and fitting sizes will only lead to problems like improper tightening nut, possible tubing damage, and leaks. Also do not swap the fitting nuts either trying to get a match as this will also lead to some of the same problems.

Oh crap:mad:

Some ppl told me to use 7/16 instead of 1/2 over 1/2 barbs and fittings as it would make a tighter seal. Juat checked some specs and realized that the problem is wall thinkness, 3/32 on masterkleer vs 1/16 as needed by koolance, I guess 1/32 does make a difference.

Now do I buy new tubing or new compression fittings ?

[atomic ferret]

You can use 7/16" over 1/2" barbs, not compression fittings.

[Waterlogged]

Oh crap:mad:

Some ppl told me to use 7/16 instead of 1/2 over 1/2 barbs and fittings as it would make a tighter seal. Juat checked some specs and realized that the problem is wall thinkness, 3/32 on masterkleer vs 1/16 as needed by koolance, I guess 1/32 does make a difference.

Now do I buy new tubing or new compression fittings ?

Can you list qty for all fitting sizes and brands you have?


As for the 7/16" over 1/2", that only really works with normal barbs the need hose clamps. Comps work on a slightly different principle. The nut actually lightly pinches the tube between itself and the barb.

http://www.xtremesystems.org/forums/attachment.php?attachmentid=83762&d=1218962250

[ptrout]

I've got

Koolance

4 x 90 degree compression fittings 1/2 - 5/8 (http://www.koolance.com/water-cooling/product_info.php?product_id=512)

4 x comp fittings1/2 - 5/8 (http://www.koolance.com/water-cooling/product_info.php?product_id=399)

2 x comp fittinga 1/2 - 3/4 (http://www.koolance.com/water-cooling/product_info.php?product_id=747)

2 sets of female and male VL-4 QDC's

2 x 1/2 barbs (http://www.koolance.com/water-cooling/product_info.php?product_id=469)

Banana power

2x black sparkle 45 1/2 - 5/8

[Waterlogged]

I would change the one set of 1/2" x 3/4" for another set of 1/2" x 5/8" and get new 1/2" x 5/8" tubing, that would be the cheapest route.

[ptrout]

Thanks for all the help
+1 for waterlogged

I think that is probably best....going to get some Durelelne 1/2-5/8 (http://www.sidewindercomputers.com/dupvctu1id5o.html)

[Waterlogged]

NP :up:

I've not used Durelene yet but IIRC, that's similar to Masterkleer which is popular here.

[Utnorris]

Watterlogged, I love the fact you sacrificed one of your compression fittings for that picture. It is the perfect thing to show someone that wants to know how compression fittings work and I didn't want to do with one of mine. :D

[Waterlogged]

Watterlogged, I love the fact you sacrificed one of your compression fittings for that picture. It is the perfect thing to show someone that wants to know how compression fittings work and I didn't want to do with one of mine. :D

No "real" compressions were harmed in the picture taking process.:D :rofl: That one there actually has 12mm threads on it and came with my INS-FM15 flow meter. I still have one that I'm looking to find a suitable sacrifice for.:ROTF:

[Utnorris]

:rofl::rofl:

[Zeus]

You prolly have the wrong size tubing or the wrong size fittings. I tighten mine by hand and can get 'm almost flush with the lower ring.

[M40TURBO]

I have 7\16 5\8 tube from swift tech and fittings from Swtech. I had to use a dremel to get them on. If i used force i got them on the tube, but the fittings where pressing the tube together.

[almighty15]

You could always try heating it up in hot water first to make the tube abit more strechable :)

[Scubar]

Dont worry i have the Bits Power 7/16" 5/8" Compressions and the Maskleer tubing and mine only goes on about the same. I too have had to use some Pliers to get them to screw on even that far.

I have noticed the its because the tubing is quite hard. The XSPC Clear 7/16" tubing is even worse. Their black and white tubing is fine though.

I also have Tygon 7/16" tubing and you can tight down the compression with your fingers because the tubing is alot softer than the others.

[HoosTrax]

Thanks for all the help
+1 for waterlogged

I think that is probably best....going to get some Durelelne 1/2-5/8 (http://www.sidewindercomputers.com/dupvctu1id5o.html)
I'd be curious to hear your personal impressions as far as the Durelene tubing (what I use) compared to the Masterkleer :up:. I think most places carry the Masterkleer -- Sidewinder is the only one I know of that sells Durelene as their Tygon-budget-alternative instead.