First Stage When the first stage is not connected to a cylinder valve, the Auto Closure Device (ACD) keeps the inlet shut to protect the first stage internal parts from contamination and corrosive water.
Exceptional cold-water performance. The LEG3ND’s integrated dry chamber keeps inner components clean and dry by isolating them from the outside environment. Deep ribs create a large heat exchange surface area that helps to prevent ice forming on the mechanism.
The new overmolded cap delays ice forming over the external diaphragm

Balanced diaphragm 1st stage provides superior, consistent performance
“T” shape body for streamlined hose positioning
Integrated dry chamber keeps inner components clean and dry by isolating them from the outside environment