Cressi AC5 / Zen

TECHNICAL FEATURES 1ST STAGE

• New piston 1st stage with INT or DIN 300bar connection.

• 4 LP ports, 1 HP port for optimal hose orientation.

• Direct external IP calibration system for precise pressure adjustment.

• IP calibration value: 9.5-10 bar for consistent performance.

• New optimized 1st stage design for maximum flow.

• Conical filter for improved filtration in both versions.

• Single maintenance kit for both INT and DIN versions.

• Increased water passage slots for better pressure balance.

• Enlarged tool housing holes for easier servicing.

• CE EN250 certification pending for warm water use.

• Glossy finish with “Gun Metal” DIN wheel.

• Interchangeable parts with AC25 and AC2 models.

• Weight, INT version: 819 g • 1 lb 13 oz

• Weight, DIN version: 644 g • 1 lb 7 oz

TECHNICAL FEATURES 2ND STAGE

• Downstream system

• Adjustable Venturi effect

• Patented antifriction lever

• Dual-injection, enlarged purge button

• Radial pressure transmission openings

• Anti-scratch surface

• Bayonet-type cap holder with security lock

• Removable exhaust tee without tools

• Weight without hose: 149 g • 5 oz

Jacketed hose extremely light and flexible. Weight: 153 g • 5 oz

Certification: EN250/2014 A>10° C

"ZEN" is a state of calm attentiveness where actions are guided by intuition rather than conscious effort." This is our ZEN of diving—you become one with the water, calm, attentive, breathing in and out intuitively without effort.
This regulator offers an ultra-lightweight and compact design to minimize jaw strain even during long dives.
Paired with our AC5, a piston-controlled first stage, it represents simplicity, robustness, and reliability. Maintenance is straightforward, fast, and cost-effective thanks to an ergonomic design that allows quick disassembly 
and reassembly without specialized tools, reducing downtime and maintenance costs.
The AC5/ZEN features an optimized design for maximum airflow and an extra-large conical filter for improved filtration in both DIN and INT versions. Enlarged water passage slots ensure efficient rinsing, providing smooth, clean functionality and a true ZEN state of mind.