Mares Abyss Octo 416504NR 035057

Mfg Part #: 416504
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  • Brand new & completely redesigned
  • Not like most other sites that sell the old discontinued model
  • Free Octo Holder
  • Specially designed mesh grid 2nd stage cover to prevent unwanted free-flow even in the strongest currents
  • Grill design optimizes the flow of water around the second stage diaphragm, minimizing the likelihood of free-flow
  • High performance in all temperature extremes - including Ice diving!
  • VAD (Vortex Assisted Design) by-pass system for effortless, natural breathing under all conditions
  • Bright "Hi-Viz" yellow hose for easy identification
  • Light weight and compact design
  • DFC (Dynamic Flow Control) for improved performance at any depth
  • Oversized purge button is extremely easy to use, even with heavy gloves

Customer Reviews for Mares Abyss Octo:

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Average Customer Review: based on 1 reviews.

Rating: Good!!!
Reviewer: Jaman B.
Very good product!!!!

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128 out of 250 people found this review helpful.

Questions and Answers for Mares Abyss Octo:

  • amar:

    Hi i bought this product to use with my ocean reef full face mask g diver as backup air supply. Is it possible if i want to convert it into quick release hose style so that it can be used in sharing air supply with another fulll face mask user. If it can be done which item i should buy and how to do it.

    Darrick  (Certified Scuba Instructor at

    Hello Amar, if you are looking to connect with a quick release another OceanReef mask to your air supply you would need to connect one of the:

  • Ed:

    Is it nitrox ready?

    Chance  (Certified Scuba Instructor at

    This product is nitrox ready up to 40% out of the box.

416504 - Octopus Abyss

All Metal for top performance

• Heavy-duty octopus for demanding dives
• Nickel and chrome-plated brass case
• Perfect match with All Metal regulator line

The front cover with metal insert and Mesh Grid, combined with the new hose protector for better heat exchange, grants maximum dependability in the most demanding water conditions.
Product Details
Code: 416504
Material: Metal
Second stage weight (g): 427
Nitrox: Yes

Product Features

All Metal Technology: Outstanding mechanical resistance and high thermal conductivity make our metal 2nd stages extremely long lasting and ideal for cold water dives. The high thermal conductivity of metal reduces the dry mouth feeling during the dive.

Mesh Grid: Patented design which reduces the impact of water flow onto the second stage diaphragm, thus eliminating free flows even in strong currents.

Superflex Hose: Extreme light weight and exceptional softness guarantee the maximum freedom of movement.

Vortex Assisted Design: The air bypass tube conveys air to the mouthpiece creating a swirling vortex with a low pressure area in the center that keeps the diaphragm down during inhalation, for very sensitive and easy breathing at all depths.

The air coming from the LP-hose passes through the second stage control valve and is conveyed directly to the mouthpiece through the by-pass tube (Mares patented). In the mouthpiece connector, the airflow creates a swirling action, or “vortex”. The core of the vortex is a low-pressure area, which, during inhalation, helps to hold down the second stage diaphragm, thus markedly increasing regulator sensitivity. The decisive advantage of the VAD System lies in the precision of its control. The VAD supplies the inhalation effort with just the intensity required.

Another advantage of the VAD system is related to the bypass tube, through which most of the air is delivered. In cold water diving, this system prevents ice crystals (which can be generated by the expansion of humid air in cold temperatures) from interfering with the proper operation of second stage components.

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