Apeks XTX40 DS4 Regulator Set
Apeks XTX40 DS4 Regulator Set
Apeks XTX40 second stage regulator
Apeks XTX40 DS4 Regulator Set

Apeks XTX40 DS4 Regulator Set

Sale price£420.00 Regular price£510.00
Save £90.00

Apeks XTX40 / DS4 Regulator set includes environmentally sealed Apeks DS4 First Stage and Apeks XTX40 Second Stage with hose.


Dispatched in 1 to 2 days

Contact Form & Details

How can we help?

If you need to contact us for any issue or assistance, you can do so online by filling out the online Contact Form, emailing us at sales@dirdirect.com or calling us on +44(0)1305 824 555. If it's about a purchase you've made for us please also include your order number.

Our brick-and-mortar store Underwater Explorers based on Portland, Dorset is staffed 7 days a week, including weekends and bank holidays. As it's an active store visited by divers from around the country and world regularly, if we can't make it to the phone for any reason please leave a message and we'll get back to you asap.

Any queries are usually answered the very same day and at most within 24 hours.


Why Portland?

We’re located on the Isle of Portland (in Dorset) because Portland has been one of the most popular scuba diving locations in the United Kingdom even before we set up operations here back in the year 2000.

On one side, we’re minutes away from the sheltered waters of Portland Marina and Harbour, while on the other, it’s just a brief walk to reach our famous scuba diving destination Chesil Cove and start of the 16-mile-long Chesil Beach.  

Portland’s location makes it ideal for scuba diving, freediving, snorkelling and other surface water sports activities. 

Check out how many wrecks we have around here by clicking on Scimitar Diving's Wreck & Dive Sites chart!

Alongside dive clubs, many instructors and dive schools travel here to train and offer scuba diving certification ranging from open water diver to mixed-gas tech diving or rebreather diving levels.

Whether you’re doing a boat dive from Portland Marina or Castletown or a shore dive at Chesil Cove, Portland is well known for offering many possibilities: Reef diving to wreck diving and night diving, underwater photography or underwater videography. Anything other than cave diving is possible here.

Likely being the best-stocked diving shop in the UK, at Underwater Explorers we offer in-store scuba diving equipment advice and sales, as well as gas fills, to locals and visitors (read About Us).

But... If you’re googling “scuba diving shop near me” like some, look no further, there's DirDirect online.

Here at DirDirect, we list our cutting-edge equipment for worldwide delivery and we’ve got you covered whatever your level of diving: We’re your local dive store wherever you are in the world.

All that with over 20 years of experience especially in technical diving, from training to equipment, advice and sales.


Underwater Explorers, Unit 1, Maritime Business Centre
Mereside, Portland, Dorset, DT5 1FD


Although the Apeks XTX40 DS4 Regulator Set is a mid-range Apeks regulator, it is still classed as a high-performance regulator in independent reviews.

Apeks DS4 XTX40 Stage Regulator Set includes

  • Apeks DS4 DIN first stage
  • Apeks XTX40 second stage
  • Apeks Flexi regulator hose

DS4 First Stage

The Apeks DS4 First Stage is a workhorse with years of tested and proven experience preferred by the most demanding technical divers.

The Apeks DS4 is over balanced for maximum performance at depth.

A dry chamber prevents water from coming into contact with the first stage spring to stop freezing.

  • Environmentally dry sealed
  • 4 MP ports
  • 1 HP port
  • Adjustable intermediate pressure
  • Finished in highly polished chrome.

XTX40 Second Stage

The XTX40 second stage comes with all the features of highly popular Apeks XTX50 Second Stage with the diver adjustable breathing resistance control.

Apeks XTX40 Second Stage is highly recommended primary or backup regulator with pneumatically balanced second stage and venturi control.

XTX40’s second stage can be converted from a right-handed hose configuration, as supplied, to a left-handed one. This feature is known as the Reversible Venturi System. Changing the regulator to a left-handed configuration is quick and simple and can be performed by any Apeks Authorised Service Technician.

The XTX40 Second Stage incorporates the feature of Diver Changeable Exhausts system. This system allows the diver to change from a small exhaust tee to a large one. This gives the user a choice of the wider exhaust tee for minimal bubble interference, essential for underwater photography, or the narrow exhaust tee for a smaller compact and comfortable set-up.

  • Integrated venturi control
  • Pneumatically balanced valve design
  • Suitable for cold and warm water use
  • Right or Left hand hose configuration
  • Changeable Exhaust Tees
SKU: RG114119