Check out this video for how to turn your racking arm in the Flex. 

To rotate the Flex racking arm, we recommend the following steps:

1. Insert the racking arm as far as possible when installing. It helps to first wet the racking arm and o-ring

2. Tighten the ball valve on to the TC x NPT adapter as much as possible. It may help to use a wrench. This will ensure the ball valve does not unscrew from the adapter while rotating. Only rotating the racking arm clockwise will also help.

3. Loosen the 1.5" clamp by two turns. This will make it possible to rotate the racking arm while still maintaining a seal.

4. Close the valve when you rotate it. This allows you to use the valve like a lever and will make rotating a little easier.