ATX40

Before the XTX range of regulators came along, the ATX models ruled the seas. The ATX40 is still available today and offers a fully balanced first and second stage that are suitable for cold-water use below 50°F (10°C) and is compatible with EAN40 out of the box. This high-performance regulator boasts an over-balanced first stage coupled with a pneumatically balanced second stage. The smooth, quiet breath is sure to enhance your diving enjoyment. Suitable for cold-water use thanks to its first stage environmental dry seal and second stage heat exchanger.

The APEXS ATX40 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. An environmental dry system keeps water out of the main spring chamber thus preventing ice build-up and keeping silt and contamination out. The chromed marine brass first stage has four medium-pressure (3/8" UNF) ports and one high-pressure port (7/16" UNF).

The XTX purge buttons are large and easy to operate even with thick gloves. These hoses are lighter weight, more flexible and more durable. Pneumatically-balanced second stage results in smooth, easy breathing. The integrated venturi control provides a performance boost at depth while preventing unwanted free flow 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. Regulator weighs 39.86 oz. (1130 g) and comes with an owner's manual.

• First Stage: APEXS ATX40 DS4
• Unique Over-Balanced Diaphragm First Stage
• Chromed Marine Grade Brass Construction
• Environmentally Sealed to Keep-Out Contaminates
• Delicate Internal Parts Not Exposed to Contaminants: Salt, Sand, Chlorine or Pool Acids
• Requires Less-Maintenance
• Secondary Environmental Diaphragm Membrane:
  First Stage Completely-Sealed-Off
  Dry Ambient Pressure Chamber
  Second-Layer of Corrosion Resistance and Prevention of Freezing in Cold-Water-Use
• Four 3/8" UNF (Unified National Fine) Medium Pressure Ports
• One 7/16" UNF High Pressure Port
• HP & MP Ports Angled for Optimum Hose Routing
• Second Stage: APEXS ATX40
• Pneumatically-Balanced Second Stage
• Smooth, Easy Breathing
• Purge Button:
  Large and Easy to Operate
  2-Stage Progressive Purge
  Press Purge On-Side for Lower Flow Rate
  Useful for Filling Lift Bags etc.
  Press Center for Full Purge
  Great for Regulator Clearing etc.
• Large Venturi Lever w/Soft Touch Rubber Grip
• Silicone Exhaust Valve Improves Breathing Performance
• Comfo-Bite Mouthpiece Virtually Eliminates Jaw-Fatigue
• Heat Exchanger (patented):
  Dissipates Cold Caused by Gas Expansion
  Draws in Warmth of Ambient Water
  Helps Prevent Freeze-Ups