*Stage 3 sets come with 1st stage, 2nd stage and octo*
- Compact machined first stage based on the expedition tested Apeks DS4 platform.
- Break through, innovative over-moulded first-stage endcap and environmental diaphragm helps prevent ice build-up that can cause first stage free flow in extreme circumstances. Also protects the first stage from impact damage.
- Large surface area heat exchanger diaphragm clamp helps increase the gas temperature inside the first stage, resulting in improved cold water performance.
- 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 faster rate than ambient. This results in superior performance at depth.
- Compact and lightweight second stage improves comfort and helps reduce jaw fatigue on long duration dives.
- High performance pneumatically balanced lever operated poppet valve.
- Large, over moulded self-flushing and controllable purge button.
- Ergonomic Venturi lever is easy to use and locate.
- Flexible nylon braided hose has better cold water performance than a traditional rubber hose.
- Standard metallic hose connection for interchangeability.
- Comfo-bite mouthpiece has a unique bridge that fits across the upper palate and does not require bite pressure to stay in place.
- Re-useable mouthpiece clip makes it simple to change mouthpieces in the field.
- Durable and flexible rubber exhaust tee provides excellent bubble diversion.
||Yoke and DIN available
|Type of first stage
||Over-balanced diaphragm design, environmentally sealed
||One piece forged body
DIN 1st stage - 638g
Yoke 1st stage - 763g
2nd stage - 154g
|Number of HP ports
||1 (7/16" UNF)
|Number of MP ports
||4 (3/8" UNF)
|Environmental Dry Kit
|First stage exterior
|Type of second stage
|Opening Effort Control Knob
|Integrated Venturi Lever
||Standard, one set
|Heat Exchanger for freezing resistance
|Overall work of breathing (WOB) scores
||Avg. 0.90 joules/liter
||Yes to 40% O2 when new, out of the box / Can be O2 cleaned to 100%.