Apeks DS4 / ATX40 Regulator System
First Stage Features (DS4 Yoke)
- Over-balanced diaphragm design – delivers increasing intermediate pressure at depth for consistent performance
- Environmentally sealed dry chamber – prevents water ingress, icing, and contamination
- Cold water rated – suitable for harsh and low-temperature environments
- Chrome-plated brass body construction
- Nitrox ready – compatible with EAN mixes up to 40%
- Ports:
- 1 × HP
- 4 × LP (fixed, non-swivel layout)
- Available in yoke configuration
Second Stage Features (ATX40)
- Pneumatically balanced second stage for smooth, effortless breathing
- Venturi control lever (IVS system)
- Enhances performance at depth
- Helps prevent freeflow at the surface
- Large purge button – easy operation even with thick gloves
- Patented heat exchanger
- Improves cold water performance
- Reduces freezing risk
- Efficient exhaust valve for reduced breathing resistance
- Comfo-bite™ mouthpiece – minimizes jaw fatigue
- Compact exhaust tee design for improved bubble dispersion
Apeks Egress Octopus
Overview
A compact, rugged alternate air source designed for reliability and visibility in emergency situations, with performance characteristics aligned with Apeks’ cold-water regulator systems.
Key Features
- Pneumatically balanced design for consistent breathing performance
- Venturi control lever to reduce risk of freeflow when not in use
- High-visibility yellow cover and hose for easy identification
- Cold water compatible with integrated thermal performance features
- Durable polymer and metal construction for long-term reliability
- Standard medium-pressure hose included
Apeks 3-Gauge Console
Overview
A durable, easy-to-read console providing critical dive data in a compact and rugged housing.
Key Features
- Submersible Pressure Gauge (SPG)
- Typically rated to 300–400 bar
- High-contrast display for low visibility conditions
- Depth Gauge
- Analog depth tracking with maximum depth indicator
- Compass
- Integrated for underwater navigation
- Rugged housing
- Impact-resistant casing
- Clear, shatter-resistant lens
- HP hose included
- Compact, streamlined design for reduced drag
System Overview
A proven cold-water, workhorse regulator setup built around the Apeks DS4 platform.
- Strengths: reliability, simplicity, cold-water performance
- Configuration style: fixed-port, non-swivel (ideal for traditional and tech setups)
- Best suited for:
- Cold water diving (Great Lakes, St. Lawrence, etc.)
- Tech divers / stage regs
- Divers prioritizing durability over lightweight materials
