Other products by Apeks
Reg. Price: $499.95
Our Price: $435.00
on orders of $25.00 or more.
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Apex by Aqua Lung ATX40/DS4 Balanced YOKE Regulator


Before the XTX became the regulator of choice, the ATX models ruled the seas. The ATX40 is still made available today at an entry-level price. This excellent regulator offers a fully balanced first and second stage with coldwater capability.

This product qualifies for Free Parts for Life


First Stage:

      • Unique over-balanced, diaphragm design - as the diver descends, the over-balancing feature allows the medium pressure gas in the hose to increase at a rate faster than ambient. This results in superior performance at depth.
      • 1 HP port and 4 MP ports are available
      • An environmental dry system keeps water out of the main spring chamber thus preventing ice buildup and keeping silt and contamination out

Second Stage

      • Pneumatically-balanced second stage results in smooth, easy breathing
      • The large purge button on the ATX is easy to operate even with thick gloves.
      • The integrated venturi control provides a performance boost at depth while preventing unwanted freeflow at the surface.
      • An extremely efficient exhaust valve improves the breathing performance of the regulator
      • The Comfo-bite mouthpiece virtually eliminates jaw-fatigue
      • 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
      • Offers a compact, integrated exhaust tee


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