MTX-R Sidemount Set

MTX-R Sidemount Set


The MTX-R sidemount set is a super tough, rugged, high performance, go anywhere sidemount regulator configuration designed to meet the rigours of cold water and extreme sidemount diving. The MTX-R is highly reliable and also very easy to service out in the field which make it an ideal choice for the expedition and exploration diver.

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First stages

  • Over balanced for superior performance.

  • Compact environmentally sealed diaphragm system completely eliminating the maintenance issues associated with silicone, oil or grease filling.

  • Recommended for frequent use in cold or contaminated water.

  • Environmental over-moulded endcap & diaphragm that helps prevent ice build-up that can cause first stage free flow in extreme circumstances. Also protects the first stage from impact damage.

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

  • 5 x 3/8” UNF medium pressure ports & 2 x 7/16” UNF high pressure ports.

  • 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 performance.

  • Angled HP ports for optimal hose routing and fitting transmitters.

  • Forged rotating turret with medium pressure ports in a parallel direction for improved hose orientation.

  • Tested for Octopus use - EN250A to 60 meters cold water.

  • Nitrox/Oxygen compatible

Second stages

  • Simple to use with no dive controls, pre-settable cracking effort or venturi control by an Apeks approved qualified technician.

  • High performance pneumatically balanced lever operated poppet valve.

  • Large diver friendly self-flushing controllable purge button.

  • Front cover with over-moulded elastomer bumpers incorporates a formed chrome plated brass plate improving durability of the demand valve.

  • Large protective elastomer bumpers on the side and on the top to protect the demand valve from impacts and scratches in the most vulnerable places.

  • Reversible second stage for either a left or right-hand gas supply.

  • Hard wearing, satin chrome.

  • All gas contact moulded parts are produced using an active protection additive that kills MRSA, protects against E-Coli, bacteria and fungi, and is also very effective against viruses, mold, yeast and algae.

  • Large heat exchanger fitted to help reduce second stage freezing.

  • Nitrox/Oxygen compatible

Kit Contents

  • 2 ea. DPT DIN 1st stages with 5 port swivel turrets.

  • 2 ea. MTX-R second stages.

  • 210cm double swivel hose.

  • 61cm double swivel hose

  • 2 ea. 25cm length MP inflation hoses (one for buoyancy system, one for drysuit)

  • 2 ea. TEK pressure gauges with 18cm hoses

  • 1 ea. 90° elbow fitting

  • 1 ea. bungee necklace

  • 1 ea. bungee clip

  • 1 ea. stainless steel bolt snap

  • 2 sets of short exhaust ports

  • Regulator bag

  • Setup illustration, CD manual and quick start guide



    Connections - DIN only

    Type of first stage - Over-balanced diaphragm design, environmentally sealed

    Body Type - Forged first stage body with heat exchanging ribs for maximum thermal performance.

    Number of HP ports - 2 (7/16" UNF) per first stage

    Number of MP ports - 5 (3/8" UNF) per first stage

    Environmental Dry Kit - Standard

    First stage exterior - Satin chrome

    Orientation - Convertible LH or RH

    Coldwater Use - Yes

    Type of second stage - Pneumatically balanced

    Opening Effort Control Knob - No

    Integrated Venturi Lever - No

    Mouthpiece - Comfo-bite™

    Exhaust tee - Diver Changeable - comes with 2 sets

    Heat Exchanger for freezing resistance - Yes

    Hose type - Rubber breathing hoses and braided flexi inflator hoses

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

    Gauge face - Tempered glass

    Over-pressure relief on gauge back - Yes