Cold-water ready and built for harsh conditions.

The MK19 EVO paired with the G260 second stage is designed to thrive in demanding technical and cold-water environments. Its environmentally sealed diaphragm first stage resists freezing, while the G260 second stage delivers smooth, reliable breathing dive after dive.

Key Benefits

• Reliable in cold water Environmentally sealed first stage keeps water and contaminants out.
• Breathing comfort Adjustable inhalation knob lets divers fine-tune resistance to their preference.
• Venturi-Initiated Vacuum Assist (VIVA) Reduces breathing effort by creating a vacuum once inhalation begins. “Dive” mode provides smooth airflow, while “Pre-Dive” mode prevents surface free-flows for safety.
• Flexible hose routing Swivel turret with bottom port supports single, twin, or stage setups.

Internal Engineering & Materials

• Balanced diaphragm first stage Ensures consistent airflow throughout the dive.
• Metal-reinforced second stage Adds durability and heat retention in cold water.
• Super-flow hose & exhaust tee Optimized for responsive breathing and minimal bubble interference.

Key Specifications

• First Stage Type Balanced diaphragm, environmentally sealed
• Material Chrome-plated brass with dry-sealed chamber
• Venturi System VIVA lever (Dive / Pre-Dive)
• Ports 2 HP opposing, 5 LP including bottom port
• Total Weight ~2.8 lb
• Nitrox Compatibility Safe for use with up to 40% O₂ out of the box; oxygen cleaning required for higher blends
• Service Interval 24 months or 100 dives
• Warranty Limited lifetime (when purchased from an authorized dealer)

With its rugged construction, environmental sealing, and VIVA-assisted breathing, the MK19 EVO / G260 is a trusted choice for divers tackling challenging environments.