Apeks XTX40 + DS4 with XTX40 Octopus

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