Apeks MTX-R Sidemount Set

Apeks MTX-R Sidemount Set

The MTX-R brings a dry-sealed, over-balanced first stage to a regulator setup built for demanding conditions. A rotating turret and heat-exchange features support practical hose routing and cold-water use, while the Comfo-Bite mouthpiece helps you hold the second stage comfortably.

Features and benefits

• Over-balanced first stage. The diaphragm mechanism increases intermediate pressure slightly faster than surrounding pressure as you descend, helping compensate for denser breathing gas at depth.
• Dry environmental chamber. The sealed chamber keeps water and sediment away from the first-stage spring mechanism and supports resistance to freezing in cold water.
• Rotating hose turret. The low-pressure turret turns to follow hose direction, making it easier to arrange hoses without tight bends around the first stage.
• Cold-water heat transfer. The ribbed first-stage clamp and second-stage heat exchanger help transfer heat from the surrounding water to areas cooled by expanding gas.
• Balanced second stage. Pneumatic balancing reduces the force needed to open the demand valve, helping the second stage respond smoothly as you inhale.
• Preset breathing controls. The MTX-R keeps diver-operated controls to a minimum. Breathing settings are configured by an authorised technician rather than adjusted during the dive.
• Comfo-Bite mouthpiece. The silicone palate bridge supports the second stage with less need to clench your jaw, which can make longer dives more comfortable.
• Accessible purge. The large purge button is easy to locate and press when clearing the second stage, including when wearing gloves.
• Flexible breathing hose. The braided hose bends readily around your equipment, helping reduce tension at the second-stage connection.

Setup and compatibility

Have the complete cylinder, hose and regulator arrangement configured and checked by a qualified technician. Use the hose routing and donation procedure covered by your twinset or sidemount training.

What’s included

Two DIN first stages with five-port swivel turrets, two MTX-R second stages, long and short double-swivel hoses, two TEK pressure gauges with short hoses, short exhaust sets, a stainless steel bolt snap and a 90° elbow.

Care, rinsing and storage

After each dive, connect the assembled regulator to a scuba cylinder and open the valve to pressurise the system. Keep it pressurised while fully submerging the first stage, second stages and connected hoses in fresh water. This allows thorough cleaning of the exposed components and hoses while helping prevent water entering the internal air passages, where it can cause corrosion and damage. Keep the cylinder secure throughout cleaning.

For routine cleaning, Dive Gear Australia recommends Cressi Neoclean Wetsuit Wash Neoprene Cleaner 500 mL or Revivex Wetsuit Shampoo 10 oz to help remove salt, chlorine and everyday residue. Dilute according to the cleaner’s label, then rinse thoroughly with fresh water.

Keep the regulator pressurised throughout washing and rinsing. Lift it out of the water and dry the first stage and cylinder connection before closing the cylinder valve, releasing the pressure and disconnecting. Fit the clean, dry dust cap, then allow the regulator to dry in the shade. Store it with the hoses loosely curved, without sharp bends or tension.

Before each dive, inspect the mouthpiece, hoses and connections for wear or damage. Have your regulator serviced by an authorised Apeks technician at the interval specified in its manual, or sooner if it leaks, is damaged or its breathing performance changes. Leave internal adjustments and repairs to a qualified technician.