The Aqualung Helix Pro is a mid-range regulator that represents the DNA of Aqualung regulators. It is a balanced first and second stage design, offering superior, consistent performance. The regulator features the patented ACD technology that seals water out of the first stage inlet, preventing internal lubrication from washing away and making it safer for elevated percentages of oxygen.

The Helix Pro's balanced diaphragm chrome plated marine brass first stage is fully protected even when the regulator is not under pressure, and it can be serviced every two years. The pneumatically-balanced second stage provides smooth, easy breathing, and the T-shape of the first stage optimizes the location of the four low-pressure (LP) ports and two high-pressure (HP) ports. The regulator is compatible with EAN 40 new, out of the box.

The Helix Pro features an easy-to-grip venturi lever that prevents unwanted free-flow at the surface while giving a performance boost at depth. The heat exchanger (patented) surrounding the valve mechanism dissipates the cold caused by gas expansion while drawing in the warmth of the ambient water. The regulator comes equipped with Aqualung's patented Comfo-Bite mouthpiece installed with a standard bite wing mouthpiece, along with a reusable mouthpiece clamp.

The regulator weighs 33.44 oz (948g) and comes with a 29" (73.7cm) low pressure 3/8" threaded hose and owner's manual. It is available in DIN with a service pressure of 300 bars (4350 psi) maximum. The Helix Pro uses parts that are common to other Aqualung models, making it easier to service. Overall, the Aqualung Helix Pro is a reliable, high-performing regulator that is an excellent value for years to come.