Apeks MTX-RC 1st Stage Din

Apeks MTX-RC 1st Stage Din

Build your regulator setup around the MTX-RC first stage’s over-balanced diaphragm design and dry environmental chamber. Its rotating turret helps you route hoses around your equipment, while heat-exchange features support its cold-water design.

This listing is for the first stage only, giving you the foundation for a compatible regulator assembly.

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 provides a larger heat-exchange surface, helping counter gas-expansion cooling.
• Angled instrument connections. The high-pressure ports angle gauges or transmitters away from the body to help organise the assembled system.

Setup and compatibility

Connection: DIN. Choose the fitting that matches your cylinder valve and its pressure rating. This is a separate regulator component. Pair it with a compatible first or second stage and the required hose; the complete assembly must be configured and checked by a qualified technician.

Care, rinsing and storage

Clean this component as part of a complete, correctly assembled regulator system. 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.