XTX40 with DS4 Dive Regulator

Overview:
The Apeks XTX40 with DS4 is a reliable and compact regulator system trusted by divers worldwide, especially within the technical diving community. Built around the proven DS4 first stage, this regulator delivers dependable performance, excellent cold-water reliability, and smooth breathing characteristics.

Unlike turret-based regulators, the DS4 features a fixed body design that offers simplicity, durability, and streamlined hose routing, making it a popular choice for twinset and technical diving configurations.

First Stage Features (DS4):

• Compact and durable DS4 first stage widely used by technical divers.

• Over-balanced diaphragm design increases medium pressure faster than ambient pressure for improved performance at depth.

• Environmentally sealed dry chamber prevents water, silt, and contamination from entering the mechanism.

• Excellent cold-water resistance and anti-freeze protection.

• 1 HP port and 4 MP ports angled for efficient hose routing.

• Chrome-plated marine brass construction for long-lasting durability.

Second Stage Features (XTX40):

• Pneumatically balanced second stage for smooth and effortless breathing.

• Large purge buttons with progressive 2-stage purge control.

• Ergonomic Venturi lever with soft-touch grip prevents free flows at the surface.

• Active antimicrobial protection against bacteria, fungi, and viruses.

• Silicone exhaust valve improves breathing performance.

• Patented heat exchanger reduces freezing risk in cold water.

• Comfo-bite™ mouthpiece reduces jaw fatigue during long dives.

• Diver-changeable exhaust system (1 exhaust tee included).

• Braided flexi-hose for durability and flexibility.

Specifications:

• Connections: DIN and Yoke available

• First Stage Type: Over-balanced diaphragm, environmentally sealed

• Body Type: Cylindrical DS4 design

• HP Ports: 1 (7/16" UNF)

• MP Ports: 4 (3/8" UNF)

• Environmental Dry Kit: Standard

• First Stage Exterior: Chrome-plated marine brass

• Orientation: Convertible left or right

• Cold Water Use: Yes

• Second Stage Type: Pneumatically balanced

• Opening Effort Control: No

• Venturi Lever: Yes

• Mouthpiece: Comfo-bite™

• Exhaust Tee: Diver changeable (1 set included)

• Heat Exchanger: Yes

• Hose Type: Braided flexi-hose

• Work of Breathing: Avg. 0.70 J/l

What’s in the Box:

• 1x First stage (DS4)

• 1x Second stage (XTX40)

• Regulator hose