Aqualung Leg3nd DIN diving regulator set

Technical sheet

Aqualung Leg3nd DIN diving regulator set

Name: Aqualung Leg3nd DIN diving regulator set
Brand: Aqualung
SKU: 137503016
Rating: 5 (12 reviews)

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12 Reviews

29 Questions

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Features of Aqualung Leg3nd DIN

Product description of Aqualung Leg3nd DIN diving regulator set

Description summary

Experience ultimate diving performance with the AQUALUNG Leg3nd DIN regulator set. Featuring an auto-balanced, auto-closure device first stage for optimal breathing and contamination protection, it excels in cold water with advanced anti-freeze properties. The second stage boasts improved water flow, reduced inspiratory effort, and a patented Comfobite mouthpiece for comfort. Its ergonomic design and durable construction ensure reliability for every dive

Leg3nd DIN Pack + Octopus.

When performance is your highest priority, LEG3ND is the answer. The LEG3ND shares the same breathing characteristics with the LEG3ND ELITE and LEG3ND MBS. The familiar venturi switch now features an updated and ergonomic design. Overmolded with “soft touch” elastomer, the ergonomically designed switch perfectly controls the venturi effect, either allowing or containing a natural freeflow.

Features:

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.

The use of this material requires specific training given by a diving instructor. The user must also read the user manual carefully. TRADEINN and/or the brand are not responsible for damages resulting from improper use. By formalizing the purchase, you declare that you have read and agree with the safety warning.

Specifications

Manual

Technical specifications of Aqualung Leg3nd DIN

First stage type

Diaphragm
Port count and configuration

2 HP, 4 LP
Cold water kit

Yes
Nitrox certification

Yes
Type of Connection

Din
Color

Black
Recommended Use

Diving
Regulators Features

Suitable for cold waters
LP Number of Outputs

4 LP
HP Number of Outputs

2 HP

Features of Aqualung Leg3nd DIN

Type of Connection Din

Type of Connection

Din

Color Black

Color

Black

Recommended Use Diving

Recommended Use

Diving

Regulators Features Suitable for cold waters

Regulators Features

Suitable for cold waters

LP Number of Outputs 4 LP

LP Number of Outputs

4 LP

HP Number of Outputs 2 HP

HP Number of Outputs

2 HP

Key differentiators

Advanced second stage with an ergonomic venturi switch and purge depth controller for optimized breathing effort.

Auto-balanced first stage with an Auto Closure Device (ACD) that seals the inlet to protect internal parts from contamination.

Equipped with 2 HP and 4 LP ports for optimal hose routing and is Nitrox certified.

Exceptional cold-water performance with an integrated dry chamber, anti-freeze properties, and a dedicated cold water kit.

Features a patented Comfobite mouthpiece made from a soft-touch elastomer to reduce jaw fatigue.

Technology in Aqualung Leg3nd DIN diving regulator set

Energy rating

Warnings

5 / 5

12 Reviews

What our customers are saying about Aqualung Leg3nd DIN diving regulator set

Experience exceptional performance with this high-quality scuba regulator. Enjoy effortless breathing, even in cold water. Built to last, this reliable regulator is a benchmark in its class, offering practical and unsurprising functionality for serious divers

Aqualung Legend

2026/04/21

Erwin

Very good regulator, suitable for cold water. Low breathing resistance, super craftsmanship. We have several, our favorite. Delivery was prompt and reliable

Aqualung legend

2021/02/25

Ste

Compliant product has what ordered arrived as expected

Impeccable transaction

2020/10/22

Not enough hindsight yet because not used.

Aqualung legend

2020/10/15

Marguerie

Great product, a benchmark in the range. Received quickly.

Aqualung legend 1st & 2nd stage regulator DIN type

2026/09/23

Heon

Good regulator, I have another one bought 20 years ago but some part was broken (2nd stage), so I decided to buy new one. I always trust its quality

Aqualung leg3nd

2025/07/30

Slava

The regulator arrived in two weeks. This is the cheapest model from the Leg3nd family. I have been using the old Legend Glacia model in the harshest conditions for many years and have no complaints. I decided to update my winter diving gear. I think the regulator will be no worse than the old one.

Aqualung leg3nd din diving regulator set

2024/12/31

Tretiak Svitlana

The transaction was successful, I am very pleased!

Super

2024/05/27

Krzysztof

No surprises. Everything is nice and practical. Shipping very fast. Regards.

Top

2024/03/10

Philippe

The best of the best ! No hesitation

Excellent product

2023/12/29

Christophe

High quality product but no surprises with this regulator

Aqualung regulator pack leg3nd din

2022/06/09

Alfonso

After 20 years without problems, it's time to change the regulator for the same model, although some things have changed. I keep the old one as a reserve regulator because it continues to work. The shipment of Diveinn correct and in the indicated time.

A legend that defies all competition

2021/09/27

H.E

Breathing ease in cold water, I confirm and this is not just a legend!

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Include AI Generated questions and answers

2025-05-23

Alexandru

Does this set come with hoses? For the second stage and for the octopus?

Answer of Adam

Yes, it includes hoses. You only need to buy a hose for the jacket if it is not included with the jacket.

Answer of Alois

Yes of course

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

What are the key features of the Aqualung Leg3nd DIN regulator's first stage?

Answer of Generated by AI and verified

The first stage of the Aqualung Leg3nd DIN regulator is auto-balanced and features an Auto Closure Device (ACD). This device keeps the inlet shut when not connected to a cylinder, protecting internal parts from contamination and corrosive water. It also includes an integrated dry chamber and deep ribs that act as a heat exchange surface to enhance its cold-water performance.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

What kind of adjustments can be made on the second stage?

Answer of Generated by AI and verified

The second stage features an ergonomic venturi switch to control the venturi effect and prevent natural freeflow. It also has a purge depth controller designed to optimize airflow with minimal effort.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

What type of mouthpiece does this regulator set use?

Answer of Generated by AI and verified

This regulator set is equipped with a patented Comfobite mouthpiece made from a soft-touch elastomer material for comfort.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

Is the Aqualung Leg3nd DIN Diving Regulator Set worth the investment for serious divers?

Answer of Generated by AI and verified

The Aqualung Leg3nd DIN Diving Regulator Set offers advanced features like an auto-balanced first stage and exceptional cold-water performance, making it a valuable choice for serious divers seeking reliability and comfort.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

Is the Aqualung Leg3nd regulator suitable for cold water diving?

Answer of Generated by AI and verified

Yes, this regulator is designed for exceptional cold-water performance. It is cold water compatible and includes features like an integrated dry chamber, anti-freeze properties, and an overmolded cap to prevent ice formation.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

How many ports does the first stage have?

Answer of Generated by AI and verified

The first stage is equipped with two high-pressure (HP) ports and four low-pressure (LP) ports for connecting gauges and accessories.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

What type of connection does this regulator use?

Answer of Generated by AI and verified

This regulator set uses a DIN connection to attach to the dive cylinder.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

Does this regulator have a venturi assist feature?

Answer of Generated by AI and verified

Yes, the second stage includes a venturi assist, which is controlled by an updated and ergonomic switch to help manage airflow and prevent freeflow.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

What is the benefit of the Auto Closure Device (ACD)?

Answer of Generated by AI and verified

The Auto Closure Device (ACD) automatically seals the first stage inlet when it's not attached to a cylinder. This provides significant protection by preventing water and contaminants from entering the internal mechanism, which helps preserve internal lubrication and keeps the filter clean and dry.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

How does the auto-balanced first stage improve the diving experience?

Answer of Generated by AI and verified

The auto-balanced (or over-balanced) design progressively increases the working pressure as you descend. This automatically counteracts the increased density of breathing air at depth, helping to maintain optimal and consistent breathing effort regardless of your depth.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

What type of hose is included with this regulator set?

Answer of Generated by AI and verified

This set comes with a flexible and lightweight Aqua Flex hose that features dual protectors for added durability.

* Generated by AI based on customer and product data

2026-09-18

Generated by AI and verified

Does this package include an octopus (alternate air source)?

Answer of Generated by AI and verified

Yes, this is a complete regulator package that includes the Leg3nd DIN first and second stages, plus an octopus.

* Generated by AI based on customer and product data

2021-09-27

PALOS MARTIN

Does this pack come with a bag or a transport / storage box? Thank you

Answer of TradeInn Expert

Hello! It comes in a box but a carrying bag is not included. Regards

* Generated by AI based on customer and product data

2023-11-07

José Roberto

Does this set come with hoses? Or do I need to buy it separately?

Answer of Christian

It comes with hoses. Black and yellow flex, and they are Aqualung-branded. Ca 75..80 cm I think.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

Is the Aqualung Leg3nd regulator suitable for diving in cold water?

Answer of Generated by AI and verified

Yes, this regulator is designed for exceptional performance in cold water. It includes a built-in cold water kit, anti-freeze properties, and an integrated dry chamber to keep internal components clean, dry, and protected from ice formation.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

What type of connection does the Aqualung Leg3nd regulator use?

Answer of Generated by AI and verified

This regulator set uses a DIN connection to attach to the dive cylinder.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

Is this regulator compatible with Nitrox?

Answer of Generated by AI and verified

Yes, the Aqualung Leg3nd Din Diving Regulator Set has a Nitrox certification, making it suitable for use with enriched air nitrox.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

Is the Aqualung Leg3nd regulator worth the investment for serious divers?

Answer of Generated by AI and verified

The Aqualung Leg3nd regulator is designed for divers who prioritize performance, especially in cold water conditions. Its advanced features like the auto-balanced first stage and ergonomic design make it a reliable choice.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

What is the first stage design of the Aqualung Leg3nd regulator?

Answer of Generated by AI and verified

The first stage features an auto-balanced diaphragm design. It also includes an Auto Closure Device (ACD) that keeps the inlet shut when not connected to a cylinder, protecting the internal parts from contamination and corrosive water.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

What kind of adjustments can be made on the second stage?

Answer of Generated by AI and verified

The second stage features an ergonomically designed venturi switch to control the venturi effect and prevent freeflow. It also has a purge depth controller to optimize airflow with minimal effort.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

What is the mouthpiece on the Leg3nd regulator made of?

Answer of Generated by AI and verified

The regulator is equipped with a patented Comfobite mouthpiece made from elastomer for enhanced comfort during your dives.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

Does this regulator have a venturi assist feature?

Answer of Generated by AI and verified

Yes, the Aqualung Leg3nd regulator includes a venturi assist feature, which is controlled by an ergonomically designed switch to help prevent freeflow at the surface.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

Is this a good regulator for a diver who prioritizes breathing performance?

Answer of Generated by AI and verified

Yes, this regulator is designed for optimal breathing performance. The auto-balanced first stage and balanced second stage work together to maintain consistent breathing effort, regardless of depth or tank pressure.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

Is the Aqualung Leg3nd suitable for deep diving?

Answer of Generated by AI and verified

Yes, the Aqualung Leg3nd is suitable for deep diving due to its auto-balanced first stage, which adjusts to maintain optimal breathing efforts at various depths.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

Can the Aqualung Leg3nd regulator be used with high oxygen content mixes?

Answer of Generated by AI and verified

Yes, the Aqualung Leg3nd regulator is compatible with Nitrox, allowing use with higher oxygen content mixes.

* Generated by AI based on customer and product data

2026-09-13

Generated by AI and verified

How does the Aqualung Leg3nd compare to the Seac It500 Ice 300 Din Diving Regulator Set?

Answer of Generated by AI and verified

The Aqualung Leg3nd offers advanced ventilation features and cold water compatibility, while specific specs for the Seac It500 Ice 300 are not available for direct comparison.

* Generated by AI based on customer and product data

2025-05-10

Diamantis

Makes for 300 bar cylinders

Answer of Pierre

Yes, in DIN version compatible with 300 Bar bottle

* Generated by AI based on customer and product data

2025-04-08

Albert

I would just like to confirm that the regulators are a full set? (hard to tell from the photo) ie. comes with first and second stage, as well as hp inflator, pressure gauge and hoses etc. Could you please ask them to quote for a full Octopus to include, the first stage, primary and secondary regulator, SPG, and inflator hose.

Answer of Antoine

The kit only includes the first stage and the second stage with its hose. There´s no pressure gauge, no hose for the direct system, and even less of an octopus. This makes sense considering the price.

Answer of Xavier

Hello, it comes with the first and second stages connected by a HP hose only. No octopus, no pressure gauge, no HP hoses, no pressure gauge, or direct system; you need to get the full pack. Have a nice day, Xavier.

Answer of Pierre

This kit only includes the first stage, hose and second stage. It does not have the pressure gauge to be purchased separately and the direct system hose to inflate the stab

* Generated by AI based on customer and product data

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Frequently bought together

Best sellers

Use cases

Cold Water and Ice Diving 100% Fit

Engineered for superior performance in frigid conditions, this regulator features an integrated dry chamber and anti-freeze properties to prevent ice formation and ensure reliable breathing in the most demanding cold water environments.

Integrated dry chamber,Anti-freeze properties,Auto-balanced first stage,Cold water kit included

Deep Technical Diving 90% Fit

The auto-balanced first stage delivers progressively increased breathing pressure at depth, ensuring consistent and effortless air supply for technical divers exploring deeper sites. The DIN connection provides a secure, high-pressure seal suitable for advanced diving configurations.

Auto-balanced first stage,DIN connection,Venturi assist,4 low-pressure ports

High-Performance Recreational Diving 90% Fit

For the serious recreational diver seeking a premium experience, this regulator offers advanced features like an ergonomic venturi switch and purge depth controller for fine-tuning breathing effort. The flexible Aqua Flex hose and comfortable mouthpiece reduce jaw fatigue on longer dives.

Ergonomic venturi switch,Purge depth controller,Flexible Aqua Flex hose,Elastomer mouthpiece

Diving in Contaminated or Silty Water 80% Fit

The first stage features an Auto-Closure Device (ACD) that seals it from the ambient environment when not connected to a cylinder valve. This provides excellent protection against water and particulate contamination, preserving internal lubrication and enhancing safety in less-than-clear water.

Auto-Closure Device (ACD),Environmentally sealed first stage,DIN connection

Best for

Ideal for Demanding Cold Water Dives

This regulator set is engineered for exceptional performance in frigid conditions, featuring an integrated dry chamber and anti-freeze properties to ensure reliability.

Based on: cold_water_kit: Yes, Cold water compatible: Yes, Anti freeze: Yes

Best for Technical Deep Diving

With an auto-balanced first stage that progressively increases pressure at depth and user-friendly adjustments, this regulator provides effortless breathing and precise control for advanced dives.

Based on: first_stage_type: auto-balanced, Second stage adjustments: venturi switch with ergonomic design and purge depth controller

A Top Choice for Uncompromised Breathing Performance

The combination of an auto-balanced first stage and an ergonomic venturi switch in the second stage delivers superior breathing efficiency and comfort across a wide range of depths.

Based on: Breathing Efficiency & Depth Range

Benefits

FunctionalReliable Performance in Cold Water Conditions

Dive confidently in colder environments knowing your regulator is equipped for the challenge. This set is designed to be cold water compatible, featuring anti-freeze properties and an included cold water kit to ensure dependable operation when temperatures drop.

Cold water compatible: Yes

Anti freeze: Yes

FunctionalOptimized Airflow for Effortless Breathing

Experience smooth and easy breathing at any depth with advanced airflow management. The second stage features a purge depth controller that optimizes air flow with minimal effort, complemented by an ergonomic venturi switch for fine-tuning.

Venturi assist: On

FunctionalConsistent and Stable Air Delivery

Rely on a steady supply of air throughout your dive, thanks to the auto-balanced first stage. This design, which includes an auto-closure device, provides consistent performance, supported by four low-pressure and two high-pressure ports for versatile accessory attachment.

Low pressure ports: 4

High pressure ports: 2

FunctionalEnjoy Greater Comfort on Every Dive

Focus more on the underwater world and less on your gear with features designed for comfort. The flexible and lightweight Aqua Flex hose reduces drag and pull, while the elastomer mouthpiece provides a comfortable fit.

Hose type: Flexible and lightweight Aqua Flex hose with dual protectors

Mouthpiece material: elastomer

Ideal buyer profiles

The Technical Diving Adventurer

This diver seeks out challenging environments, including deep and cold-water locations. They require gear that offers uncompromising performance, reliability, and precision control to ensure safety and efficiency on technical dives.

The Aqualung Leg3nd is engineered for extreme conditions, with a dedicated cold water kit and anti-freeze properties ensuring reliable function in frigid water. Its auto-balanced first stage provides consistent air delivery at various depths, while the two high-pressure and four low-pressure ports accommodate a full range of technical gear.

The Premium Diving Enthusiast

This individual invests in high-quality equipment that enhances their diving experience through superior comfort, performance, and advanced features. They dive frequently in various conditions and value gear that is both durable and user-friendly.

This regulator set delivers an exceptional experience with features like the ergonomic venturi switch and purge depth controller for effortless breathing adjustments. The auto-closure device protects internal components, enhancing durability and security, while the lightweight Aqua Flex hose and comfortable elastomer mouthpiece reduce jaw fatigue on long dives.

Competitive features

When evaluating diving regulators, performance in various conditions, reliability, and breathing comfort are key differentiators. We're comparing the Aqualung Leg3nd DIN Diving Regulator Set against several popular models, including offerings from Dive Rite, Apeks, Scubapro, and Mares. Our analysis focuses on the features described for each product to help you determine the best fit for your diving needs.

Where it excels

The Aqualung Leg3nd is explicitly designed for high performance, particularly in cold water, featuring advanced anti-freeze properties and an auto-closure device to protect internal components from contamination. Comfort is a standout feature, with a patented Comfobite mouthpiece designed to reduce jaw fatigue and an ergonomic venturi switch for easy control of airflow. It incorporates an auto-balanced first stage, engineered to provide optimal breathing performance regardless of depth or tank pressure.

Consider alternatives if...

Verdict

The Aqualung Leg3nd DIN Diving Regulator Set establishes itself as a strong contender for divers who prioritize performance and comfort, especially in cold water environments. Its design emphasizes reliability with features like the auto-closure device and anti-freeze properties. While the provided comparison data does not offer detailed technical specifications across the board, the Leg3nd's described features, such as the auto-balanced system and patented Comfobite mouthpiece, position it as a high-quality option for dedicated divers.

Specs comparison

	Aqualung Leg3nd DIN diving regulator set	Aqualung Leg3nd Mbs Din Diving Regulator Set
Anti Freeze	Yes	Yes
Cold Water Compatible	Yes	Yes
First Stage Type	auto-balanced	Diaphragm
High Pressure Ports	2.0 bar	2 HP
Low Pressure Ports	4.0 bar	4 LP
Mouthpiece Material	elastomer	elastomer
Venturi Assist	On	On
First Stage Design	auto-balanced	auto-balanced

Specs vs competitors

	Aqualung Leg3nd DIN diving regulator set	Tecnomar Sd Proteus Tek Diving Regulator Set	Zeagle F8 Din Diving Regulator Set	Seac It500 Ice 300 Din Diving Regulator Set	Oms Airstream Evoque Din Miflex Pvd Diving Regulator Set 75 Cm	Mares Atlas Premium Din Diving Regulator Set
Anti Freeze	Yes	Yes	Yes	Yes	-	Yes
Cold Water Compatible	Yes	Yes	Yes	Yes	Yes	-
First Stage Type	auto-balanced	Balanced	Diaphragm	Diaphragm	-	Piston
High Pressure Ports	2.0 bar	2 HP	2.0 bar	2 HP	2.0 bar	2 HP 7/16” UNF Ports
Low Pressure Ports	4.0 bar	4 LP	5.0 bar	4 LP	4.0 bar	4 LP 3/8” UNF Ports
Mouthpiece Material	elastomer	not specified	silicone	-	-	-
Venturi Assist	On	Yes	Yes	On	On	On
First Stage Design	auto-balanced	balanced	balanced diaphragm	balanced diaphragm	overbalanced	balanced piston
Second Stage Adjustments	venturi switch with ergonomic design and purge depth controller	Adjustment Valve	inhalation effort control knob	-	Diver Adjustable with clutch to avoid over torqueing	-