Depth-proven engineering. Pure breathing confidence for adventurous UK divers.

Discover the Apeks XTX + DS4 system — the regulator choice for divers who want unshakable reliability and refined performance without unnecessary complexity. Pairing the robust DS4 first stage with the award-winning XTX50 second stage, it delivers strength, control and silky-smooth inhalation where it counts most.

The DS4 first stage uses a unique over-balanced diaphragm architecture that automatically increases hose gas pressure faster than ambient pressure as you descend, unlocking stronger airflow and consistent performance at depth. With 2 high-pressure and 4 optimally-angled medium-pressure ports, hose routing becomes neater, more hydrodynamic and less stressful on your setup — ideal for single cylinder rigs and twin configurations alike.

Cold-water tested. Contamination protected. Designed to thrive in British diving conditions, the sealed environmental dry system keeps water and debris out of the spring chamber, reducing freeze risk, blocking silt and safeguarding internal components when visibility drops or temperatures fall. Whether you’re exploring inland training sites or heading offshore to coastal wrecks, it’s built to shine when the water isn’t on its best behaviour.

The XTX50 second stage brings breathing excellence to every dive, powered by a pneumatically-balanced valve for smoother, easier inhalation and reduced work-of-breathing. You stay in command thanks to the easy-to-grip breathing tension control knob, large venturi lever with soft-touch grip, and oversized purge button engineered for fast, progressive clearing.

Comfort that lasts. Innovation that protects. The patented heat-exchanger fins harness ambient water warmth to counter the chill of gas expansion, supporting stable breathing in colder environments. A premium silicone exhaust valve boosts performance further, while the Comfo-Bite™ mouthpiece helps reduce jaw fatigue, letting you focus on the dive — not your regulator.

For divers who want a future-proof, cold-capable, high-control regulator that simply works — dive after dive, breath after breath — this is dependable performance at its finest.

Breathe better. Control more. Dive anywhere.

APEKS XTX40 DS4