MTX-R + MTX-R Octopus

MTX-R + MTX-R Octopus


The new MTX-R is based on the MTX, a regulator that was developed in accordance with the United States Navy Experimental Dive Unit extreme cold water test. Innovations in design mean that the MTX-R regulator performs in almost freezing water at a depth of over 60 metres, something that very few other regulators on the consumer market can boast.

With an innovative first stage design that helps to prevent ice build up around the diaphragm, the MTX-R is reliable, rugged and expedition ready.


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The Apeks MTX-R comes with the MTX-R Octopus


  • A first of its kind, over-moulded first-stage end cap and environmental diaphragm to prevent ice build-up that could cause a free flow in extreme circumstances.

  • Forged 1st stage body gives maximum thermal performance.

  • Ribbed diaphragm clamp on the 1st stage ensures improved heat exchange in cold water conditions.

  • Angled HP ports allow for optimal hose routing and transmitter fitting.

  • Parallel turret ports allow for improved hose orientation.

  • Superb protection from impact damage on both the 1st and 2nd stage.

  • Simple to use 2nd stage with no dive adjustment controls and a reduced chance of free flow.

  • Double swivel hose for greater freedom of movement and comfort.

  • Patented heat exchanger surrounds the valve mechanism, dissipating the cold caused by gas expansion while drawing in the warmth of the ambient water.

  • Developed in accordance with the United States Navy Experimental Dive Unit extreme cold water test.

  • Tested for Octopus use to 60 meters in cold water.


Connections - Yoke

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 - 5 (3/8" UNF)

Environmental Dry Kit - Standard

First stage exterior - Satin chrome

Orientation - Convertible LH or RH

Coldwater Use - Yes - extreme

Type of second stage - Pneumatically balanced

Opening Effort Control Knob - No

Integrated Venturi Lever - No

Mouthpiece - Comfo-bite™

Exhaust tee - Diver Changeable - one set supplied

Heat Exchanger for freezing resistance - Yes

Hose type - Braided Flexi-hose

Nitrox compatible - Yes to 40% O2 when new, out of the box / Can be O2 cleaned to 100%.