For you purists that want a QD coupler on your Airsource, we've heard your cry. In addition to the current Airsource with FCD (freeflow control device), we now offer an Airsource with a traditional QD coupler. This unit makes it possible to add an in-line sonic alert device.
The Airsource QD boasts all of the same great features as the current model such as:
Pneumatic balancing for great performance
Detachable "Trim Grip"™ in the middle of the corrugated hose
Corrugated hose with recess and clips to accommodate the mp hose
Soft-touch purge cover
How to detach Airsource 3: