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• 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. The regulator is
supplied with both sets of exhaust tees.
• An optional 5th port is available which features the additional bonus of an
integrated heat exchanger (available on the Tungsten, XTX200 first stages).
• 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 Authorized Service Technician.
• Available in yoke or DIN configuration.
• Braided flexi-hoses are now standard on all models. These hoses are lighter
weight, more flexible and more durable.
• Suitable for coldwater use (below 10°C / 50°F).
• Compatible with EAN40 out of the box.

First Stage
• FSR style first stage.
• Highly polished bright chrome plating.
• Compact one piece body.
• 4 angled medium pressure ports, 4 x 3/8” UNF.
• 2 angled high pressure ports, 2 x 7/16” UNF.
• Optional 5th port.
• Removable ARCAP valve seat.
• Unique over-balanced, diaphragm design - as the diver descends,
the over-balancing feature allows the medium pressure gas in the
hose to increase at a rate faster than ambient. This results in superior
performance at depth.
• An environmental dry system keeps water out of the main spring
chamber thus preventing ice buildup and keeping silt and contamination

Second Stage
• Pneumatically-balanced second stage results in smooth, easy breathing.
• The XTX purge buttons are large and easy to operate. A 2-stage
progressive purge is used - press the purge on the side for a lower
flow rate, useful where more control is required such as filling lift bags
etc, then press in the center for the full effect of the purge, i.e. when
regulator clearing etc.
• The large venturi lever has a soft touch rubber grip, which makes it
easier to locate and use. The lever reduces the amount of grit ingress
and therefore resists any possible friction giving a smooth operation.
• Easy-to-grip opening effort control knob keeps the diver in control.
• The second stage is manufactured with active protection against
infection as all moulded parts are produced with an additive that kills
MRSA, protects against E-Coli, bacteria and fungi, and is also very
effective against viruses, mould, yeast and algae.
• A silicone exhaust valve improves the breathing performance of the
• The Comfo-biteTM mouthpiece virtually eliminates jaw-fatigue.
• A heat exchanger (patented), which surrounds the valve mechanism,
dissipates the cold caused by gas expansion

XTX40 Octopus
The XTX40 Octopus provides the same features and performance as the XTX40 second stage and includes
left / right hand reversibility. It comes with a high visibility yellow front cover and a 36” yellow hose.
Suitable for cold water use (below 10°C / 50°F).

Contact Us

3869 Lake Emma Road
Lake Mary FL, 32746

Ph: (407) 333-8856

M-F 10am-7pm
SAT 10am-5pm
SUN 1pm-5pm (unless otherwise posted)

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