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The Master Breathing System (MBS) is a revolutionary feature in the Aqualung Leg3nd Regulator that simplifies breathing comfort control, making your underwater adventure more enjoyable and less strenuous.
The Auto-Closure Device (ACD) is a unique mechanism in the Aqualung Leg3nd Regulator that prevents corrosive water from entering the first stage inlet. This feature ensures the internal lubrication remains intact, protecting against water or silt intrusion and prolonging the lifespan of the regulator.
The three anti-freeze properties integrated into the Aqualung Leg3nd Regulator work together to keep the inner components clean and dry, prevent ice formation in cold water conditions, and provide a better grip with a bi-material soft grip surface.
Yes, the Aqualung Leg3nd Regulator is compatible with up to 40% O2 right out of the box, making it a safer choice for dives involving elevated oxygen percentages.
The Comfo-Bite mouthpiece is a feature of the Aqualung Leg3nd Regulator designed to eliminate jaw fatigue, enhancing your comfort during prolonged dives.
Review Summary
2021-01-28T12:20:46
Great Regs, easy breathing and not too heavy
MATT B.
Balanced Diaphragm
Four, 3/8" UNF Thread
Two, 7/16 UNF Thread
Inhalation Effort
Dive/Pre-Dive Venturi (Free Flow) Knob
Yes, Up to 40% O2
Pneumatically Balanced Downstream Demand Valve
First Stage: Chrome Plated Brass
Second Stage: Techno-Polymer, Polyurethane, Silicone
29" (73.7cm)
3/8"
191649978901
Great Reg
By MATT B.
Great Regs, easy breathing and not too heavy

LEG3ND is for the passionate, the explorers, the ones for whom diving is more than a sport. Aqua Lung, the original pioneer of the scuba regulator, brings you the most capable, coveted and advanced line of regulators ever created: This is the new LEG3ND, a masterpiece of engineering, built for all conditions, all depths and all dives.
After all, the ocean is the ultimate proving ground - a place where respect is given and earned equally, where true Legends belong.




For divers who view diving as more than just a sport, but a state of mind, Aqualung's Legend regulator line is the perfect choice. With over 70 years of experience, Aqualung has created a range of regulators designed for divers of all levels and diving conditions. The Legend regulators are overbalanced diaphragm regulators that provide excellent breathing performance and feature the revolutionary Master Breathing System (MBS) for simple breathing comfort control.
The Auto-Closure Device (ACD) keeps corrosive water out of the first stage inlet, preventing internal lubrication from washing away and ensuring that water or silt will not enter the first stage. Aqualung's three anti-freeze properties keep inner components clean and dry, prevent ice formation, and provide a better grip with a bi-material soft grip surface.
The pneumatically balanced second stage provides smooth and easy breathing, and the Comfo-Bite mouthpiece eliminates jaw fatigue. The regulator comes with an enlarged heat exchanger, ergonomic exhaust tee, air chamber deflector, and a detachable and reusable mouthpiece clamp for a quick and simple tool-free mouthpiece change without plastic waste.
Choose Aqualung's Leg3nd MBS regulator for high-performance features and ease of breathing. It is compatible with up to 40% O2 right out of the box, making it safer for elevated percentages of oxygen. The regulator also features radial openings to prevent free-flows in strong currents, a wide surface area for easy regulator purge, and a venturi switch to prevent free-flow at the surface.
In conclusion, Aqualung's Legend regulator line is synonymous with modern scuba regulators, offering comfort, ease of breathing, control, and peak performance. Whether you're a new or experienced diver, Aqualung has developed diving regulators that perfectly suit your diving needs.
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