Air leak test question

[luckystrike]

Hello,
I have finished my loop yesterday and it is my first custom loop build. ( well at least the loop part.. haven't started cable management..gosh)
Also, used ekwb leak tester to test the loop for any leak issues.
My questions is I had air pumped in so the meter (bar unit) would stay on just past 0.5 bar (green zone) and there were no problem.

When I pushed little more to 0.6 ish, one of two parts of the loop keeps popping out making loud noise. Note that I don't really think this is air leaking at all. It is air tight and it's just pushing out of the fitting looks like.

I have a 90 angle fitting connected on the reservoir outlet to GPU as L shape and I think it just too movable and that is why it's causing it and I don't think it is got to do with broken O-ring or something else?

Could anyone give me some advice on how to fix this issue?
Or having no air leak on 0.5 bar would just do it after all?

I will attach pictures for easier understanding.

 

[red eye]

Wet finger with washing up soap around the problem fitting, pressure up if you see bubbles you have a leak.

 

[luckystrike]

Wet finger with washing up soap around the problem fitting, pressure up if you see bubbles you have a leak.

I did that already. Put soap water around it. No air leak at all. It looks like it's just pushing the whole tube away from the bottom line of the fitting and once it reaches top it just pops out letting air out then.

 

[luckystrike]

I have it on that mark on the meter and it didn't leak for more than 4 hours. No pressure drop.
Is there a maybe way to make the connections more secure?

 

[red eye]

Ideally we need to know what the running pressure of the loop is, which I have no idea but I’m guessing it’s between .5 and .75bar and in that case I would want it safe at .75+ especially where you have marked it.
Because if your blocks gunk up your pump is going to pressurize that tube, I don’t know how much pressure maybe less than .75.

Can you not scrap that 90* bend and use a 90* fitting? The fitting will handle .75 bar.

Better safe then sorry

 

[luckystrike]

Ideally we need to know what the running pressure of the loop is, which I have no idea but I’m guessing it’s between .5 and .75bar and in that case I would want it safe at .75+ especially where you have marked it.
Because if your blocks gunk up your pump is going to pressurize that tube, I don’t know how much pressure maybe less than .75.

Can you not scrap that 90* bend and use a 90* fitting? The fitting will handle .75 bar.

Better safe then sorry

do you mean this part?
As in connect Temp Display right on to the 90 fitting and down to reservoir?

 

[tyler_jrb]

Rads are pressure tested to 1bar so I’d personally want my loop to sustain up to 0.75bar if not more.

Usually the pipes should be tight enough that you will really struggle to pull them out by hand depending on the fittings used.

 

[luckystrike]

Rads are pressure tested to 1bar so I’d personally want my loop to sustain up to 0.75bar if not more.

Usually the pipes should be tight enough that you will really struggle to pull them out by hand depending on the fittings used.

Hi! I used Barrows fittings.
I believe they are quite firm? Maybe not
Is this maybe because i may have chamfered the edge little narrower than needed?

 

[red eye]

do you mean this part?
As in connect Temp Display right on to the 90 fitting and down to reservoir?

Your pic is broken but I get you.
If you put a 90’ fitting then you’ll solve your problem. I believe when pressured the swivel on your pump is allowing the 90’ bend to swing out so to say. If you hold that piece while pressurizing it’s will hold .75bar

 

[red eye]

Hi! I used Barrows fittings.
I believe they are quite firm? Maybe not
Is this maybe because i may have chamfered the edge little narrower than needed?

If you chamfers the corners of the tube your ok, you do that so you don’t have a cutting edge to damage the orings