$ 449.00 USD

The AT20 is the predecessor to the XTX20. We brought it back to the Apeks line up because it represents an excellent value. This is an ideal entry-level regulator that can spoil divers in a hurry.

This product qualifies for Free Parts for Life.

This high-performance regulator boasts an balanced first stage coupled with a pneumatically balanced second stage.

The smooth, quiet breath is sure to enhance your diving enjoyment.

Designed for water temps above 50°F / 10°C

The Comfo-bite™ mouthpiece, with its patented bridge virtually eliminates jaw-fatigue

Compatible with EAN40 out of the box.

First Stage:

  • The first stage is a balanced diaphragm type that offers consistent performance from start of dive until end of dive, regardless of depth.
  • 1 HP port and 4 MP ports are available
  • Available in yoke only

Second Stage:

  • Pneumatically-balanced second stage results in smooth, easy breathing
  • The large purge button on the AT20 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
  • Offers a compact, integrated exhaust tee
Connections Yoke only
Type of first stage Balanced diaphragm design
Body Type Cylindrical (US4)
Number of HP ports 1 (7/16" UNF)
Number of MP ports 4 (3/8" UNF)
Environmental Dry Kit None
First stage exterior Chrome over marine brass
Coldwater Use No, designed for temps above 50ºF / 10ºC
Type of second stage Pneumatically balanced
Integrated Venturi Lever Yes
Mouthpiece Comfo-bite™
Heat Exchanger for freezing resistance No
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%