FREE SHIPPING ON PURCHASES OVER £50

Apeks ATX40 Regulator DS4 -Features and Specifications

First Stage:

  • Uses the DS4 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.
  • Available in DIN and yoke.

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.
Connections Yoke only
Type of first stage Over-balanced diaphragm design, environmentally sealed
Body Type Cylindrical with environmental dry seal (DS4)
Number of HP ports 1 (7/16" UNF)
Number of MP ports 4 (3/8" UNF)
Environmental Dry Kit Standard
First stage exterior Chrome over marine brass
Coldwater Use Yes
Type of second stage Pneumatically balanced
Integrated Venturi Lever Yes
Mouthpiece Comfo-bite™
Exhaust tee Diver Changeable - comes with 2 sets
Heat Exchanger for freezing resistance Yes
Overall work of breathing (WOB) scores Avg. 0.85 joules/liter
Nitrox compatible Yes to 40% O2 when new, out of the box / Can be O2 cleaned to 100%.
Weight Yoke 1130g

Need it tomorrow?

We offer next day delivery.

Not ready to commit

30 day returns.

Not enough Money?

Financing available.

Let's help our oceans

1% goes to Sea-Changers