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- Compact machined first stage based on the expedition tested Apeks DS4 platform.
- Large surface area heat exchanger diaphragm clamp helps increase the gas temperature inside the first stage.
- Compact and lightweight second stage improves comfort and helps reduce jaw fatigue on long duration dives.
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. The XL4+ regulator is a high-performance option for those technical divers serious about weight savings.
The first stage uses the same over-balanced diaphragm design as found in the rest of the Apeks first stage and incorporates a heat exchanger for cold water performance. There are four low pressure ports and two high pressure ports to offer plenty of hose options. The 2 HP ports mean you can use a pressure gauge as well as a wireless transmitter to monitor your air consumption.
The compact second stage features a balanced valve for excellent performance and easy breathing, diver adjustable venturi control, a heat exchanger on the inlet for improved cold water performance, a compact exhaust tee and an Apeks comfo-bite mouthpiece for total comfort in the water.
The regulator includes a white braided low pressure hose.
Compact machined 1st stage based on the expedition tested Apeks DS4 platform.
Break through, innovative over-moulded first-stage endcap & 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 1st 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 2nd 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.
White flexible nylon braided hose has better cold water performance than 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.
UV inhibitors to help prevent discolouration of the white materials.
Connections Yoke and DIN available
Type of first stage Over-balanced diaphragm design, environmentally sealed
Body Type One piece forged 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 Standard
First stage exterior Satin
Coldwater Use Yes
Type of second stage Pneumatically balanced
Opening Effort Control Knob No
Integrated Venturi Lever Yes
Exhaust tee Standard, one set
Heat Exchanger for freezing resistance Yes
Hose type Braided Flexi-hose
Overall work of breathing (WOB) scores Avg. 0.90 joules/liter
Nitrox compatible Yes to 40% O2 when new, out of the box / Can be O2 cleaned to 100%.
Scuba Dive Store always offer an extended returns policy of 30 days – so you can rest assured that if the suit, piece of diving equipment or gift doesn’t suit then just send it back and we will either exchange it or offer a full refund less any postage costs. Please return the item to the following address: