APEKS ATX40 DS4 Yoke Regulator

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.