Description

Apeks AT/US4 Regulator Pack – DIN 300Bar

The Apeks AT/US4 Regulator Pack – DIN 300 Bar offers divers access to a fully balanced regulator system at an entry-level price point, making it an ideal choice for those looking to step into reliable Apeks performance without unnecessary complexity. Designed specifically for warm water diving, this regulator is intended for use in water temperatures above 10°C / 50°F and delivers smooth, dependable breathing characteristics suited to recreational diving environments.

At the core of the Apeks AT/US4 Regulator Pack is a fully balanced first stage, engineered to deliver consistent airflow regardless of depth or cylinder pressure. This balanced design ensures that breathing effort remains stable throughout the dive, allowing divers to focus on buoyancy control, navigation, and enjoyment rather than equipment performance. The first stage is fitted with one high-pressure port and four medium-pressure ports, providing ample flexibility for standard recreational hose configurations while keeping the overall setup clean and streamlined. The regulator is available in both DIN and yoke configurations, allowing divers to choose the connection type best suited to their cylinders and local diving practices.

The pneumatically balanced second stage is designed to deliver smooth, easy breathing across a range of conditions. By balancing internal pressures, the second stage reduces inhalation effort, contributing to a comfortable and controlled breathing experience. An integrated venturi control further enhances performance by boosting airflow at depth while helping to prevent unwanted freeflow at the surface. This automatic balance between performance and control makes the regulator well suited to newer divers who want dependable function without constant adjustment.

Comfort is further enhanced by the inclusion of the Comfo-bite™ mouthpiece, which is designed to virtually eliminate jaw fatigue during longer dives. By reducing pressure on the jaw and improving overall fit, the mouthpiece helps divers remain relaxed and focused underwater. Altogether, the Apeks AT/US4 Regulator Pack delivers simplicity, comfort, and trusted engineering in a warm-water regulator designed for accessibility and ease of use.

• Designed for warm water use only
• Not suitable for cold water diving below 10°C / 50°F

FEATURES

• Fully balanced regulator at an entry-level price point
• Designed for warm water use only, above 10°C / 50°F
• Consistent airflow regardless of depth or cylinder pressure
• One high-pressure port for pressure gauge or transmitter
• Four medium-pressure ports for flexible hose routing
• Available in DIN and yoke configurations
• Pneumatically balanced second stage for smooth breathing
• Integrated venturi control to enhance performance at depth
• Venturi system helps prevent unwanted freeflow at the surface
• Comfo-bite™ mouthpiece to reduce jaw fatigue

SPECIFICATIONS

• Connections: DIN
• Body Type: Cylindrical
• Number of HP ports: 1 (7/16″ UNF)
• Number of MP ports: 4 (3/8″ UNF)
• First stage exterior: Chrome over marine brass
• Coldwater Use: No
• Type of second stage: Pneumatically balanced
• Integrated Venturi Lever: Yes
• Mouthpiece: Comfo-bite

PACKAGE CONTENTS

• Apeks AT/US4 First Stage – DIN 300 Bar
• Apeks Second Stage
• Pre-fitted mouthpiece