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MTX-RC Stage 4 -2 | MTX-CR Regulator, MTX-RC Octopus, Pressure /Depth Gauge Console

Stage 4 sets come with Apeks instrument console and H.P. Rubber Hose. Addition for optional low diameter H.P. Flex Hose.


First stage

• Available in yoke or DIN configuration.
• Suitable for cold water use (below 10°C / 50°F)
• 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. • Over-moulded innovative endcap and environmental diaphragm, a forged

1st stage body offering maximum thermal performance,
• The 5th 3/8” UNF medium pressure port includes a protective bumper when

not in use.
• Forged first stage body with heat exchanging ribs for maximum thermal

• Angled HP ports for optimal hose routing and fitting of transmitters.
• Forged rotating turret with medium pressure ports in a parallel direction for

improved hose orientation.
• Ribbed diaphragm clamp for improved heat exchange in cold water

• Double swivel hose for greater freedom of movement and comfort.
• Tested for Octopus use - EN250A cold water.
• Nitrox/Oxygen compatible – Up to 40% O2 outside the EU (European Union),

within the EU anything above 21% O2 must use an M26 Connection.


second stage

• High performance, pneumatically balanced, lever operated poppet valve.
• Large, diver friendly self-flushing controllable purge button.
• Front cover with over-moulded elastomer incorporates a formed chrome

plated brass plate improving durability of the second stage.
• Large protective elastomer bumpers on the side and on the top to protect the second stage from impacts and scratches in the most vulnerable places. • Reversible second stage for either a left or right hand gas supply

• A heat exchanger (patented) which surrounds the valve mechanism,

dissipates the cold caused by gas expansion while drawing in the warmth

of the ambient water.
• Comfo-bite mouthpiece
• Double swivel hose
• Flexible nylon braided hose has better cold water performance than

Part # yoKe




Part # DiN




MTX-RC 1st Stage

MTX-RC 2nd Stage

MTX-RC Regulator MTX-RC Stage 3 MTX-RC Stage 4 -1 MTX-RC Stage 4 -2

traditional rubber hose.
• Simple service kits.
• Venturi control.
• Breathing resistance control.


*Quality bag
included with regulator and stage sets.

Apeks MTX-RC Regulator Set

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