PRODUCT DETAILS
A first stage built for the divers who dive when others don’t.
BACK IN STOCK JUNE 2026
Compact, rugged, and tuned for the realities of cold UK water, the Apeks MTX‑RC First Stage is the ultimate foundation for dependable gas delivery on demanding backmount and twin-tank rigs.
Thermal performance that fights the freeze
A satin-plated machined brass body is carved with high-surface-area heat-exchange ribs, backed by a ribbed diaphragm clamp that actively helps reclaim warmth from ambient water, improving internal gas temperature and reducing freeze risk when diving colder layers around the cold‑water gas expansion cooling.
Impact-armoured, not impact-anxious
Its breakthrough over-moulded endcap and environmental diaphragm provide smart insulation that helps prevent ice-triggered free-flow, while also shielding critical components from knocks, cylinder collisions, and gear-bag abuse between dives. This is protection you feel in durability, not drag.
Stronger by physics at depth
The unique over-balanced diaphragm architecture increases medium-pressure hose delivery faster than ambient pressure rises on descent, keeping airflow stronger, smoother and more stable at depth. It’s depth-stable gas delivery, not depth-hopeful gas delivery.
Routing logic that finally makes sense
Five medium-pressure ports — four mounted on a 360° rotating turret — allow hoses to run clean, parallel and low-stress. Twin angled high-pressure ports align naturally for secure transmitter fitting, making it a tidy partner for modern dive electronics. The double-swivel LP connection liberates head movement, reduces jaw-pull, and makes valve drills feel less like a workout.
Choose your connection, keep your control
Available in DIN, yoke, or M26 threading, with variants suitable for 300 bar, 232 bar, and enriched gas configurations, it releases one-hand easy thanks to oversized, glove-friendly handwheels.
Cold-qualified backup breathing chain
Tested for octopus reliability to 60 m in cold water under EN250A standards, this 1st stage carries credentials that experienced divers respect.
Why divers choose the MTX-RC as a stand-alone 1st stage
✔ Satin-plated brass body with heat exchange ribs
✔ 5 MP ports, 4 on rotating turret for clean hose orientation
✔ 2 angled HP ports for gauges or transmitters
✔ Over-balanced diaphragm for stronger depth delivery
✔ Over-moulded impact protection + freeze resistance
✔ Double-swivel LP for better mobility & comfort
✔ One-hand release handwheels for glove-friendly operation
✔ Tested and certified to 60 m cold-water standards
✔ Designed and built in the United Kingdom
Rugged where it matters. Warmer where it counts. Stronger the deeper you go.
Breathe deeper. Rig cleaner. Dive colder.