Aqua Lung Core


The Core regulator’s amazing breathing, which is rated as “superior” on the ANSTI breathing machine, coupled with its generous features, at an attractive mid-range price, provides the best value of any regulator offered today. The Core comes standard with Aqua Lung’s unique, patented, auto-closure device (ACD) which seals water out.

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  • Auto Closure Device (ACD) – keeps corrosive water out of the first stage inlet by automatically closing as the Core is removed from the cylinder valve
    • This prevents internal lubrication from washing away
    • Safer for elevated percentages of oxygen
  • The balanced diaphragm first stage provides superior, consistent performance
  • The pneumatically-balanced second stage results in smooth, easy breathing
  • Available in yoke (3300 psi / 232 bar max) or din (4350 psi / 300 bar max)
  • The T-shape of the first stage optimizes the location of the 4 MP ports and 2 HP ports
  • Uses parts that are common to other Aqua Lung models for easier servicing
  • The easy-to-grip venturi lever prevents unwanted freeflow at the surface while giving a performance boost at depth
  • A heat exchanger (patented) which surrounds the valve mechanism, dissipates the cold caused by gas expansion while drawing in the warmth of the ambient water
  • Compatible with EAN 40 new, out of the box
  • Equipped with Aqua Lung’s patented Comfo-bite™ mouthpiece along with a reusable mouthpiece clamp

Additional information


Yoke, DIN

Type of first stage

Balanced diaphragm design

First stage weight yoke / din (grams)

700 / 510

Auto-Closure Device (ACD)


Number of HP ports


Number of MP ports


First stage exterior

Chrome over marine brass

1st Stage Flow Rate

1450 l/min

Type of second stage

Pneumatically balanced

Second stage weight - (grams)

175 g


Venturi switch

Breathing resistance



2 – Comfo-Bite™ installed, standard with bite wings in box

Heat Exchanger for freezing resistance

Standard on all models

Hose type

29" braided AquaFlex hose

Overall work of breathing (WOB) scores

Avg. 0.80 joules/liter

Nitrox compatible

Yes to 40% O2 when new, out of the box




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