APEKS MTX-RC 2ND STAGE ONLY (OCTOPUS)

Rugged backup. Refined breath. Mission-grade peace of mind.

The Apeks MTX‑RC Octopus is the backup second stage that dives like your primary — built tough, breathing smooth, and engineered to be found instantly when needed.

Forged for extreme environments, its military-inspired brass architecture is wrapped in impact-shield elastomer bumpers to protect key failure zones from deck drops, rib-jabs, and gear-bench chaos. But toughness is only half the story — this octo delivers exceptionally low work-of-breathing, thanks to its high-performance pneumatically balanced poppet valve, giving stable, whisper-easy inhalation even when you’re task-loaded, valve-drilling or cold-numb.

Control you can feel, even in thick gloves

The oversized Venturi control is deliberately large and tactile, letting you steer gas delivery without hunting for levers mid-dive. The self-flushing purge button delivers instant clearing and returns cleanly every time, resisting silt and grit-induced stick — perfect when your brain is busy and your hands are cold.

Cold-water credentials, not cold-water clauses

A patented heat exchanger wraps the valve mechanism, dissipating the deep chill of gas expansion while reclaiming warmth from ambient water — improving thermal stability and dramatically reducing freeze risk in colder layers around the United Kingdom. It’s certified for cold-water use under EN250A cold‑water performance, which means when the mercury drops, your backup doesn’t.

Reversible for the real world

The second stage quickly swaps left- or right-hand feed, making routing clean across stage bottles, sidemount rigs, or primary donation drills without twisting hoses into origami. Speaking of hoses — the high-visibility yellow braided LP hose sets itself apart instantly in low-viz, high-stress, or training scenarios.

Why this octo earns a place on serious rigs:

✔ Balanced inhale valve for ultra-smooth breathing
✔ Oversized Venturi airflow control you can adjust in gloves
✔ Impact-protected with elastomer armour
✔ Self-flushing, snag-resistant purge
✔ Fully reversible second stage for clean routing
✔ Patented heat-exchange tech that steals warmth from the water
✔ True cold-water certification
✔ Visible-from-space yellow braided hose included

Because a backup regulator should rescue the dive — not spoil it.

Breathe smoother. Deploy faster. Dive colder. Trust deeper.