Originally Posted by DRONE
The other thing about positioning, is to remember that the QD's come apart with just a little push against the button. So if anything bumps that button while the fuel line is under pressure you could have a fire. The first time I did mine, it wasn't until I had everything back together before I realized that one of my QD's needed to be rotated 180 degrees.
Another little trick, and I just learned this, is to buy TWO of the QD's for the crossover line and put a QD on each side. Then, when removing and replacing your tank, you don't have to fuss around trying to fish the crossover line over to the other side.
From my experience the QD not only needs the button pushed in, but some pressure needs to be exerted to push the two parts together before they will come apart.
Also, the pressure won't let the fuel out, they seal when opened. That is the point of them.