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XL Stage 4 -2 | XL Regulator, XL4 Octopus, Pressure /Depth Gauge Console (Yoke or DIN)

Stage 4 sets come with Apeks instrument console and H.P. Rubber Hose. Addition for optional low diameter H.P. Flex Hose.


The Apeks XL4 is a compact lightweight regulator suitable for diving in all environments including cold water locations. Its design and low weight help reduce jaw fatigue on long dives. The XL4 also makes an ideal stage regulator, perfect for the technical exploration diver with a large amount of equipment. It is a high performance option for the technical diver who is serious about weight savings.


First stage

  • 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.

    second stage

  • 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.


Apeks XL4 set

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