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Phobya quick disconnects jamming shut

post #1 of 3
Thread Starter 
Just a quick warning for anyone else with Phobya quick disconnects. Specifically, I have these:

http://www.watercoolinguk.co.uk/p/Quick-Release-Connector-13mm-Barbed-Fitting-12Inch-Coupling_19166.html
and
http://www.watercoolinguk.co.uk/p/Quick-Release-Coupling-13mm-Barbed-12-Plug-Male-Incl-Bulkhead-Union_19152.html

I had been having a problem where my aquaero flow sensor would show no flow through the loop and shut the PC down. I thought it was a faulty reading from the flow meter at first, until I found hot tubes one time and realised I really was getting zero flow.

Next, I suspected a faulty pump, and replaced it, but the problem persisted.

I eventually tracked it down to these QDCs. If you put two of them together and blow through them, they seem open, but when water is flowing through them it seems that the force of water compresses the springs and jams them shut.

I've done a lot of testing of various pairs of them in different combinations of male/female today and found them all to do it to some extent. You can run a slow flow of water through them from a tap, but if you turn the tap up a bit towards loop levels of flow, they either jam totally shut, or they start "hammering" where they shut momentarily, then open again. I have also tested them on a pump and they do the same thing.

Flow levels don't have to be particularly high - they were doing this in my loop with a maximum of 1GPM.

Obviously, this could cause a disaster - it was lucky I had a flow meter or I may never have noticed until this cooked my waterblocks. The pressure build-up behind them when they jam shut could also pop a hose off - I actually think a leak I just found a few days ago in my almost brand-new radiator must have been caused by this pressure build up. Fortunately for me, I brought the rad from the same supplier as the QDCs so I am hopeful of getting a replacement rad and a refund on the faulty QDCs without too much trouble.

Anyway, I am not sure if I have been unlucky and got 10+ of these from a faulty batch, or if there is an inherent design fault, but if you do have these or are planning on buying them I'd definitely advise doing a tap test on them before putting them in a loop, and if you do have any flow problems they should be the first thing to check.
Edited by BorisTheSpider - 10/20/12 at 1:59pm
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post #2 of 3
Wow, that is a detrimental flaw. Have you contacted Phobya?
 
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Hard DriveCoolingCoolingCooling
Samsung 830 Swiftech Apogee XT Rev. 1 EK-FC HWLabs Black Ice GTX 240 and a Koolance HX-CU72... 
CoolingCoolingOSOS
MCP 35X and a MCP 350 Koolance 401x2 Opensuse 12.1 Windows 7 
KeyboardPowerCase
Ducky OCN with cherry blues Antec True Power New 650W Cooler Master CM690 II 
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post #3 of 3
Thread Starter 
I tried, but their website seems to be down. I have let the retailer know, and will be telling phobya about this as soon as I can.
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Hard DriveHard DriveOptical DriveCooling
1TB Samsung Spinpoint F3 2TB Samsung Spinpoint F4 Asus BW-12B1LT Custom loop with external radbox 
OSMonitorMonitorMonitor
Windows 7 Ultimate x64 Crossover 27Q LED-P Crossover 27Q LED-P Optoma GT720 
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16GB G-Skill DDR3 1600MHz 256GB Samsung 830 SSD 512GB Samsung 830 SSD 256 GB Samsung PB22-J SSD 
Hard DriveHard DriveOptical DriveCooling
1TB Samsung Spinpoint F3 2TB Samsung Spinpoint F4 Asus BW-12B1LT Custom loop with external radbox 
OSMonitorMonitorMonitor
Windows 7 Ultimate x64 Crossover 27Q LED-P Crossover 27Q LED-P Optoma GT720 
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