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 Aqua Lung'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.

Free Parts for Life Program (Regulator Service Agreement)

The Free Parts for Life Program allows the customer to receive free parts when the regulator is due for overhaul. Free parts consist of the normal replacement items as found in the Regulator 1st & 2nd Stage Service Kits. Labor charges are not covered. Assuming the program guidelines are followed, the Free Parts for Life Program will apply to the life of the regulator and will significantly reduce the cost of ownership. This program is in addition to the standard product warranties outlined in the owner’s manual. The Free Parts for Life Program is a commitment by you (the Regulator owner), your Aqua Lung Dealer and Aqua Lung. To participate, you must be the original owner and have purchased the regulator from an Authorized Aqua Lung or Apeks America Dealer. The regulator must be brought to an Authorized Dealer at least once a year for inspection or overhaul according to the below schedule:

Year #1: Inspection

Year #2: Overhaul

Year #3: Inspection

Year #4: Overhaul

Year #5: Etc.

To keep the Free Parts for Life Program active, both inspections and overhauls need to be documented in the Annual Service & Inspection Record included in the Owner’s Manual CD or the Record can be found online. If an inspection or overhaul is missed, the regulator no longer qualifies for the Free Parts for Life program. Visit Water World SCUBA, your local Aqua Lung Dealer, for more information.