First Stage

• Type of first stage     Overbalanced diaphragm design
• Auto-Closure Device (ACD)     Yes
• Number of HP ports     2
• Number of MP ports     4
• 1st Stage Flow Rate     1500 l/min
• 1st Stage Weight in DIN            747 g
• 1st Stage Weight in Yoke     957 g
• Environmental Dry Kit     Permanent
• First stage exterior     Chrome over marine brass

Second Stage

• Type of second stage                                   Pneumatically balanced
• Controls                                                       Venturi switch
• Breathing resistance                                   Adjsutable
• Mouthpieces                                             2ea. – A Comfo-Bite, installed, and a standard with bite wings in the box
• Lip shield                                             Included
• Heat Exchanger for freezing resistance        Standard on all models
• 2nd Stage Weight                                             227 g
• Hose length                                             730 mm
• Overall work of breathing (WOB) scores     Avg. 0.70 joules/liter
• Nitrox compatible                                                     Yes, to 40% O2 when new, out of the box

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.
  • Preserves the internal lubrication
  • Keeps the inlet filter clean and dry
  • Safer for elevated percentages of oxygen
• Exceptional cold-water performance is achieved by modernizing Aqualung's three anti-freeze properties:
  • Where there's no moisture, there's no ice: 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 (+30% vs Glacia / +70% vs Legend 2)
• The new overmolded cap delays ice forming over the external diaphragm

• Auto-Balanced (also known as Over-Balanced)

• Progressive increase of the working pressure to maintain optimum breathing efforts: Depending on the diver's depth, the working pressure of the first stage is automatically elevated to counteract the increased breathing air density

• Ergonomically shaped DIN and YOKE screws made of a bi-material “Soft Grip” surface provide a better hold when installing or removing the first stage – especially with cold hands
• Channeled YOKE screw to prevent water retention.
• Specialized ACD Dust cap attached to the regulator body to protect the inlet fitting and the ACD system from impacts or damage
• Perfectly positioned HP and MP ports provide optimal hose routing

Second Stage

• New front cover opening channels allow water to flow sideways over the diaphragm

• Radial openings to prevent freeflows when diving in stronger currents
• Openings widened to reduce peak inspiratory flow by an impressive 20%
• New overmolded exhaust cover made of elastomer with a “soft touch” effect
• Overmolded air purge
  • Wide surface area makes regulator purging easier
  • Purge depth controller optimizes air flow with minimal effort
• Patented Comfobite mouthpiece reduces jaw fatigue and secures the second stage more comfortably.
• Detachable and reusable mouthpiece clamp allows a quick and simple tool-free mouthpiece change without plastic waste.
• The enlarged heat exchanger helps to prevent freezing of the second stage mechanism
• Air channel deflector
  • Directs the air flow evenly during the inhalation phase
  • Streamlined bi-material deflector lowers the exhalation effort
• Flexible and lightweight Aqua Flex hose with dual protectors