Before there was XTX there was ATX. The ATX40 has not disappeared, it is still available. It has a fully balanced first and second stage. Read more...

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799.98 CAD Excl. tax
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The ATX40 offers a smooth quiet breath that will surely improve the quality of your dive. It is safe for cold water diving (temperatures below 10°C/50°F).

Design based on the XTX40 second stage. Can be configured for right-hand or left-hand use. Safe for cold water diving (below 10°C/50°F). Features an adjustable venturi lever control to control the rate of air flow. It has a high visibility yellow front cover, accent pieces and 36” hose.

Apeks ATX 40/DS4 Yoke features

1st stage:Uses DS4 first stage

  • Overbalanced diaphragm allows medium air pressure in the hose to increase at a faster rate than ambient pressure, which means easier breathing at greater depths
  • 1 HP port and 4 MP ports
  • Environmental dry system keeps out contamination and resists freezing
  • Compatible with EAN40 when new

2nd stage

  • Pneumatically-balanced second stage makes breathing smoother and easier
  • Large purge button makes purging easy even with thick gloves
  • Integrated venturi lever makes it possible to have better performance at depth while avoiding wasteful free-flow at the surface
  • Extremely efficient exhaust valve
  • Comfo-bite mouthpiece eradicates jaw fatigue
  • The Heat Exchanger, which surrounds the valve mechanism, dissipates cold caused by gas expansion while taking in the warmth of ambient water
  • Compact, integrated exhaust tee


ATX40 Octopus:

  • Large easy to operate purge button
  • 2-stage progressive purge button allows diver to control purge flow rate
  • Able to have right and left hand configurations
  • Lightweight, flexible and durable braided flexi-hoses now standard
  • Compatible with EAN40 when new
  • Pneumatically-balanced second stage
  • Easy to use venturi lever
  • Manufactured with active protection against infection
  • Silicone exhaust valve improves performance
  • Comfo-bite mouthpiece
  • Suitable for cold water use (below 10°C /50°F)