Apeks MTX-R Sidemount Set


£1,285.00 £1,428.00


Apeks 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. Highly reliable and easy to service out in the field, this is the ideal choice for expedition and exploration divers.

First stages

  • Over balanced for superior performance.
  • Compact environmentally sealed diaphragm system 
  • Recommended for frequent use in cold or contaminated water.
  • Environmental over-moulded endcap & diaphragm that helps prevent ice build-up 
  • 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


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