Apeks Nitrox XTX100 Regulator

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The Apex Nitrox XTX100 regulator is fully balanced and tuned to handle 100% Oxygen Nitrox blends. It's made to take the most challenging dives wherever you dare.

Free UK Delivery

The Apex Nitrox XTX100 regulator is fully balanced and tuned to handle 100% Oxygen Nitrox blends. It's made to take the most challenging dives wherever you dare.

Apeks Nitrox XTX100 Regulator

The Nitrox variant of the XTX100 regulator has been laboriously oxygen-cleaned in Apeks specialised labs and fitted with an M26 EU standard connection. This allows it to be used with 100%-Oxygen Nitrox blends. Enjoy longer bottom times and fewer decompression stops.

The Apex Nitrox XTX100 regulator is fully balanced, and made to take the most challenging dives wherever you dare.

The XTX100 FST 1st Stage is environmentally sealed preventing contaminants infiltrating your air supply while allowing the regulator to function effortlessly in ice cold water. 2 high pressure and 4 low pressure ports allows you to route your hoses for a streamlined layout. An optional 5th low pressure port gives you complete control of your diving configuration, ideal for complex setups.

When you’re exploring deep water, the ambient water pressure surrounding you constricts your hoses, resulting in reduced airflow. The FST’s over balanced diaphragm counteracts this to deliver clear and consistent airflow in the most challenging of environments.

The XTX100 2nd stage is feature packed and designed to work the way you want. The XTX100 has an interchangeable exhaust, allowing you to swap between a compact exhaust or a larger one for improved bubble dispersion. Both a venturi control and Opening Effort dial let you customise your regulators breathing feel to suit your preference and needs. Pneumatically balanced, you’ll enjoy easy, relaxed breathing even when your tank is running low on pressure.

The XTX100 comes with a Comfo-Bite Mouthpiece. This mouthpiece features a bridge that sits across your palate and supports the regulator preventing jaw fatigue during long dives. Even better, it stops the dry, filtered air from your regulator drying out your mouth during long dives, so you can explore the seas in comfort.

In Europe the Apex Nitrox Regulators are sold with an M26 connection.

Do not attempt to use any Nitrox Product until you have obtained training in nitrox use with mixtures containing over 21% 02 from a nationally recognised training agency.


  • 100%-Oxygen Nitrox Compatible - While many of regulators are able to support low concentration nitrox blends the Apeks Nitrox XTX100 has been oxygen cleaned - a complex a rigorous procedure that must be undertook is incredibly clean labs. This allows it use 100% oxygen nitrox blends, enough for the most advanced divers!

Apeks XTX100 FST 1st Stage

  • Over-Balanced Diaphragm - The Apeks XTX100 1st stage has an overbalanced diaphragm. As you descend the 1st stage gradually increases the airflow to your hoses, countering the constricting effect of the ambient water pressure around you. This ensures you can enjoy consistent and effortless breathing even in the most extreme diving environments.
  • One Piece Body - The Apeks FST 1st stage has a single piece body, making it more robust and light. This also has the added benefit of extracting more heat from the surrounding ambient water, preventing ice build-up with the regulator.
  • Easy Hose Routing - The FST 1st stage features 2 high pressure and 4 low pressure ports, all angled to ensure routing is easy and ergonomic.
  • Optional 5th Port - The optional 5th port allows you to configure your dive set-up the way you want with optimal routing.
  • Environmentally Sealed - The XTX100 is environmentally sealed ensuring no water or microbes can get in. This helps to prevent ice build-up with the regulator causing free flow and stops bacteria, mould or water-borne infections getting into your air supply.
  • Cold Water Ready - Designed for technical diving the XTX100 is capable of functioning in extremely cold environments (below 10*C) making it more than suitable for UK diving and around the world.
  • Satin Finish - The XTX100 has a luxurious satin finish that resists wear and looks incredible.

Apeks XTX100 2nd Stage

  • Interchangeable Exhaust - The XTX range of regulators come with 2 swappable exhausts to suit your needs. The first is small and convenient, while the second is larger offering superior bubble dispersion, ideal for underwater photographers or divers with wider faces.
  • Easy-Push Purge Button - The XTX 2nd stage features a large 2 stage purge. Pushing the button in a small amount provides a slower, more controlled purge. Pushing the button fully in rapidly purges the regulator.
  • Venturi Lever - The large venturi level is easy to locate and use and any time and allows you to control how much breathing effort is required to receive air.
  • Opening Effort Control - Let your regulator breathe at its best with the large Opening Effort Control for maximum breathability.
  • Anti-Bacterial Design - The XTX 2nd stage has been designed with active anti-bacterial protection. The additive kills MRSA, protects against E-Coli, bacteria and fungi, ensuring you stay safe in hostile underwater environments.
  • Comfo-bite™ Mouthpiece - Apeks’ Comfo-Bite Mouthpiece features a comfortable bridge that sits across your palate. By supporting your regulator it eliminates jaw-fatigue and stops dry, filtered air from your regulator drying out your mouth so you can enjoy your dive in greater comfort.
  • Heat Exchanger - A heat exchanger surrounds the valve mechanism helping to dissipate the ice-cold temperatures in your regulator by extracting warmth from the surrounding water, the result is warmer, more comfortable air.
  • Braided Hose - The XTX regulator uses a braided hose for improved performance in deep water and greater flexibility, so you can manoeuvre more easy when wearing the regulator.

Who is the Apeks Nitrox XTX100 Regulator For?

The Apex XTX100 regulator offers superb performance that any discerning diver will benefit from. Made to handle the extremes of technical and cold water diving it’s extremely versatile and rugged.

Capable of handling 100% Oxygen Nitrox blends makes it something of a specialised tool for divers looking to get the most out of their dives - enjoy longer bottom times and reduced decompression stops. Before using Nitrox you must receive training from a certified specialist!

Who are Apeks?

Well known for their design and manufacturing of high quality breathing apparatus, Apeks supply more UK divers with regulators than any other dive manufacturer. Apeks has grown to become one of the benchmarks of the industry with superior standards in both engineering and design. Innovative development of not only their regulators but other diving equipment, Apeks offer a lifetime guarantee on all of their equipment, a testimony to the reliability and quality.

Apeks Nitrox XTX100 Specification
Connections M26 and DIN available
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 4 with 5th port option (3/8" UNF)
Environmental Dry Kit Standard
First stage exterior Satin chrome over marine brass
Orientation Convertible LH or RH
Coldwater Use Yes
Type of second stage Pneumatically balanced
Opening Effort Control Knob Yes
Integrated Venturi Lever Yes
Mouthpiece Comfo-bite™
Exhaust tee Diver Changeable - comes with 2 sets
Heat Exchanger for freezing resistance Yes
Hose type Braided Flexi-hose
Overall work of breathing (WOB) scores Avg. 0.70 joules/liter
Nitrox compatible Yes to 40% O2 when new, out of the box / Can be cleaned to 100%
Weight Yoke 1322g / DIN 1192g
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