A fully-balanced regulator at a fantastic entry-level price. This regulator by Apeks is suitable for warm water use only (above 10C / 50F). The Apeks AT20 US4 regulator has been designed for warm water diving. Just because it is warm water equipment does not mean it is of low quality. The AT20/US4 is a very good breathing regulator featuring our venturi control and it is also balanced.

Before the XTX range of regulators came along, the ATX models ruled the seas. The ATX is still available today and offers a fully balanced first and second stage with cold water capability (can be used in all temperatures including those below 10 C / 50 F).

This high-performance regulator boasts an over-balanced first stage coupled with a pneumatically balanced second stage.

The smooth, quiet breath is sure to enhance your diving enjoyment.

Suitable for coldwater use thanks to its first stage environmental dry seal and second stage heat exchanger.

Compatible with EAN40 out of the box.

The new MTX-R is based on the MTX, a regulator that was developed in accordance with the United States Navy Experimental Dive Unit extreme cold water test. Innovations in design mean that the MTX-R regulator performs in almost freezing water at a depth of over 60 metres, something that very few other regulators on the consumer market can boast.

With an innovative first stage design that helps to prevent ice build up around the diaphragm, the MTX-R is reliable, rugged and expedition ready.

Go warm, go cold, go deep, go anywhere. Enjoy control in the extreme with the incredibly robust and durable MTX-RC scuba diving regulator that is perfect for cold water diving. This model was inspired by the Military's MTX, which was developed in accordance with the United States Navy Experimental Dive Unit extreme cold water test.

Combining rugged, military grade engineering with the super-smooth breathing experience that Apeks regulators are renowned for, the MTX-RC is the regulator that lets you explore more with  ultimate peace-of-mind.

The Apeks XL4+ is a compact lightweight regulator suitable for diving in all environments including cold water locations. Its design and low weight help reduce jaw fatigue on long dives. The XL4+ also makes an ideal stage regulator, perfect for the technical exploration diver with a large amount of equipment. The XL4+ regulator is a high-performance option for those technical divers serious about weight savings.

The Apeks XL4 is a compact, lightweight regulator suitable for diving in all environments including cold water locations. Its design and low weight help reduce jaw fatigue on long dives. The XL4 also makes an ideal stage regulator, perfect for the technical exploration diver with a large amount of equipment. The XL4 is a high performance option for those technical divers serious about weight savings.

The XTX Tungsten is built on the XTX200 platform but is protected with a hard, durable Physical Vapor Deposition (PVD) finish. This “tough as nails” finish is better than traditional chrome plating. The coating is made of high quality grades of Titanium, Zirconium and Chromium. The result not only looks extremely attractive, but protects your investment from normal diving abuse. Now for 2018, the XTX Tungsten is supplied complete with a 5th port.

The XTX Tungsten is built on the XTX200 platform but is protected with a hard, durable Physical Vapor Deposition (PVD) finish. This “tough as nails” finish is better than traditional chrome plating. The coating is made of high quality grades of Titanium, Zirconium and Chromium. The result not only looks extremely attractive, but protects your investment from normal diving abuse. Now for 2018, the XTX Tungsten is supplied complete with a 5th port.

The DS4 first stage lacks the rotating turret found on the XTX50 first stage and offers one HP port. This compact first stage is a time-proven workhorse that has been embraced by the technical community around the world.

The XTX50 is for the discerning diver who wants the benefits of a feature-rich regulator at a moderate price. This popular regulator has four medium-pressure ports all mounted on a rotating turret, resulting in optimal hose routing while eliminating sharp bends in the hose.

The Apeks XTX 40 DS4 regulator is built for oxygen percentages between 0 - 100%. This compatibility coupled with its excellent reliability makes it the choice for technical divers to do high O2 percentage deco stops.

Green and yellow cosmetic pieces clearly identify that this regulator is dedicated to high-percentage oxygen use. The compact DS4 first stage has four low-pressure ports and one high-pressure port (it does not feature the rotating turret found on the DST first stage).

Features an innovative Diver Changeable Exhaust system (DCE). This system gives the diver the ability to change from a small exhaust tee to a large exhaust tee. This gives the user a choice, wider exhaust tee for minimal bubble interference (essential for underwater photography), and narrow exhaust tee for a smaller compact comfortable regulator. Only the narrow exhaust tee is supplied with the regulator. It can be converted from a right-handed hose configuration to a left-handed one. The process of changing the regulator to a left-handed configuration is both quick and simple.

However, this procedure must ONLY be performed by an APEKS Authorised Service Technician. A braided Flexi-hose comes standard. These hoses are lighter weight, more flexible, and more durable. Suitable for coldwater use (below 10 C / 50 F). This regulator is suitable for use with up to 100% oxygen. 

Ideal for the discerning diver, the XTX50 by Apeks offers a feature-rich regulator at a moderate price. This top-of-the-line regulator boasts four medium-pressure ports all mounted on a rotating turret, resulting in optimal hose routing whilst eliminating sharp bends in the hose.

Always emulated but never equaled, this regulator is compact, lightweight, and easy to clean, pack, and maintain. It's been the standard in regulators for decades, and our recent updates have given it a fresh new look and improved resistance to changes in pressure and temperature. Perfect for beginner divers.

The Helix compact Pro is Aqualung's smallest and most compact regulator. It can be used for both warm and cold water. It shares most features with the Helix Pro, but is easier to travel with.

Something so small and light, you’d hardly notice it’s there that was the goal that led to the new Helix Compact. This regulator is designed for anyone looking to save space while maintaining the advantages of a full-sized regulator. It offers unparalleled comfort, breathing ease, and function in a travel-sized package.

The first inhalation underwater is the start of a new adventure. The revolutionary combination of Venturi effect and inhalation effort adjustment is natural and intuitive. AquaLung's Master Breathing System allows divers to control both in one simple rotation. All depths, all conditions, all dives - MBS will adapt.

When performance is your highest priority, LEG3ND is the answer. The LEG3ND shares the same breathing characteristics with the LEG3ND ELITE and LEG3ND MBS. The familiar venturi switch now features an updated and ergonomic design. Overmolded with “soft touch” elastomer, the ergonomically designed switch perfectly controls the venturi effect, either allowing or containing a natural freeflow.​