In the process of giving More Beer's Inline Thermometer a try, I was also able to try out their line of stainless steel quick disconnects.
These come in four varieties:
A look inside
They line is designed to seal well with flow in either direction. In brewing applications they will work at up to 60 PSI.
I found these to be solid and really well made. I like the fact that I could disengage the QD with one hand. If you're looking for a QD system these are a solid choice. It's also worth mentioning that replacement orings/gaskets are available for these - Here
Check out the entire lineup - Here
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