After seeing a couple posts at OCN and Koolance own forums about Koolance Quick Disconnect leaking problems...I knew my experience was not isolated.
http://www.overclock.net/water-cool...ak-qdcs-leaking-everywhere.html?highlight=qdc
http://forums.koolance.com/viewtopic.php?f=11&t=1724 (post #3)
I now have 10 males and 8 female QDC VL3N series quick disconnections used in various applications. The first set I bought about two years ago, the females are still working fine today. However, I recently bought a bunch of new sets, and the new female connectors have all failed. To be clear....the new connectors worked fine for the first few months over dozens of connect/disconnect operations. But now, the spring loaded mechanism meant close the valve in the female end no longer closes completely, allowing the connection to drip when disconnected (see the images below).
edit - I have verified the problem is not related to low loop pressure.
I suspect a minor change in manufacturing that is causing the long term failure of these parts. Tim [Koolance] eluded to a change in manufacturing tolerances last year (post #8).
If I am correct, Koolance should issue a recall on these parts. In the mean time, be sure to check your connections within the 1 year warranty period and get RMA replacements if yours connectors are showing similar problems. If you are already outside the warranty period, please be careful with your connectors when breaking your systems down to prevent leaking on your HW
Here is a shot of my older QDC, both female fittings have been serving me well for about two years now.
Here is a shot of the newer QDC failing to seal properly....all of my newer female QDC fitting do this consistently now.
Also, I need your comments please, let us know if you have older/newer QDC fittings, and whether or not you've seen similar issues.
http://www.overclock.net/water-cool...ak-qdcs-leaking-everywhere.html?highlight=qdc
http://forums.koolance.com/viewtopic.php?f=11&t=1724 (post #3)
I now have 10 males and 8 female QDC VL3N series quick disconnections used in various applications. The first set I bought about two years ago, the females are still working fine today. However, I recently bought a bunch of new sets, and the new female connectors have all failed. To be clear....the new connectors worked fine for the first few months over dozens of connect/disconnect operations. But now, the spring loaded mechanism meant close the valve in the female end no longer closes completely, allowing the connection to drip when disconnected (see the images below).
edit - I have verified the problem is not related to low loop pressure.
I suspect a minor change in manufacturing that is causing the long term failure of these parts. Tim [Koolance] eluded to a change in manufacturing tolerances last year (post #8).
If I am correct, Koolance should issue a recall on these parts. In the mean time, be sure to check your connections within the 1 year warranty period and get RMA replacements if yours connectors are showing similar problems. If you are already outside the warranty period, please be careful with your connectors when breaking your systems down to prevent leaking on your HW
Here is a shot of my older QDC, both female fittings have been serving me well for about two years now.
Here is a shot of the newer QDC failing to seal properly....all of my newer female QDC fitting do this consistently now.
Also, I need your comments please, let us know if you have older/newer QDC fittings, and whether or not you've seen similar issues.
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