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Apeks XL4 Ocea Stage 3

Regular price£792.00
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Apeks XL4 Ocea Stage 3

The XL4 Ocea presents a new concept of regulator to the diving market. One that comes with the inherent build quality and performance shared by all Apeks regulators, but having the prime objective of being the first totally sustainably produced regulator available. Every manufacturing detail has been considered and adjusted to ensure each material and process has been optimised in the pursuit of minimal environmental impact. Apeks partnership with PlasticBank, establishes the XL4 Ocea as the world’s first ocean plastic negative regulator.

The Ocea is the first of its kind – an environmentally-conscious regulator made from recycled materials and bio-plastics, manufactured in a solar-powered facility. Based on the XL4+, every single material and process was reconsidered to create the most eco-sensitive scuba diving regulator in the world. The Ocea is a truly game-changing regulator that removes five times its own weight in plastic from the environment.

First Stage Details of the Ocea

  • 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.
  • 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.
  • 2 HP ports and 4MP ports

Second Stage Details of the Ocea

  • 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

Specifications of the Ocea


Yoke and DIN available 

Type of first stage 

Over-balanced diaphragm design, environmentally sealed 

Body Type 

One piece machined body 

Number of HP ports 

2 (7/16" UNF) 

Number of MP ports 

4 (3/8" UNF) 


DIN – 905g (2 lb) 

Yoke – 1041g (2.3 lb) 

Environmental Dry Kit 


First stage exterior 


Coldwater Use 


Type of second stage 

Pneumatically balanced 

Opening Effort Control Knob 


Integrated Venturi Lever 




Exhaust tee 

Standard, one set 

Heat Exchanger for freezing resistance 


Hose type 

Braided Flexi-hose 

Overall work of breathing (WOB) scores 

Avg. 0.90 joules/liter 



Not the regulator for you, then have a look at our other options and if you can not find what you are looking for contact us and let us help you find what you are looking for.

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For the adventurer taking on extreme cold water dives and technical challenges, our Apeks regulators are the pinnacle of durability and precision. Our experienced team is ready to help you navigate our selection to find the regulator that best fits your diving adventures. Contact us now for personalised assistance and start your journey to unforgettable dives with the ideal regulator.