Scubapro MK17 EVO2/C370 Regulator Set - REG455 YOKE

• Sealed balanced diaphragm design makes for the ultimate compact first stage for cold water or contaminated diving conditions.
  
• Air-balanced diaphragm delivers consistent and effortless airflow, regardless of depth, tank pressure, or breathing rate.
  
• Dry chamber is completely environmentally sealed with a dual diaphragm system that keeps out contaminated water. The rib is designed to enhance heat exchange, making the first stage cold water-proof.
  
• Two opposing high-pressure ports positioned on a 15º angle allow the first stage to be positioned either up or down, plus provide an optimal hose/transmitter layout.
  
• S600 second stage's air balanced valve smoothes out the inhalation effort at varying depths and supply pressures.
  
• Rugged reinforced technopolymer second stage case and front cover with stainless steel frame looks good plus is extremely durable.
  
• Metal valve housing (barrel) is able to withstand years of aggressive diving.
  
• User controls include a diver-adjustable inhalation effort knob and Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch.
  
• Super-flow hose features an oversized bore (larger inside hose diameter) that allows more air to flow on each inhalation.
  
• Ultra-comfortable orthodontic mouthpiece is easy to grip yet doesn't inhibit airflow.
  

What our Experts Think

• Cold-water ready & environmentally sealed – MK17 EVO2 uses a dry, sealed diaphragm design that keeps contaminants out and improves freeze resistance in cold or silty water conditions.
• Stable, balanced airflow – Delivers consistent gas flow regardless of depth or tank pressure for predictable breathing performance.
• Compact, travel-friendly build – New forged-body design makes it smaller and lighter than previous MK17 versions, ideal for divers who travel frequently.
• Easy hose routing – Angled HP ports and multiple LP ports allow clean, flexible configuration for gauges, octo, and inflator setup.
• Simple, durable second stage – The C370 offers adjustable inhalation effort and a dive/pre-dive switch while keeping a rugged, lightweight construction.
• Good breathing comfort for its class – Air-balanced second stage design reduces effort and improves comfort across varying depths.
• Great “do-it-all” recreational system – Commonly chosen as a reliable all-rounder for travel, quarry, and recreational diving in mixed conditions.

Q&A

Maintenance Tips

• Rinse thoroughly with fresh water after every dive, keeping the yoke dust cap securely fitted to prevent water entering the MK17 EVO2 first stage.
• Lightly operate the purge button and Venturi (VIVA) lever on the C370 during rinsing to clear salt and sand from moving parts and prevent sticking.
• Do not allow water into the first stage inlet; always rinse only when properly sealed/protected.
• Allow the regulator to air dry completely in a shaded, ventilated area away from heat and direct sunlight.
• Store hoses loosely coiled to avoid kinks and stress on fittings and swivel points.
• Inspect hoses, mouthpiece, yoke O-ring, filter area, and second stage controls regularly for wear, corrosion, or cracks before each dive.
• Avoid sand, oils, solvents, chlorine, and harsh chemicals that can damage seals and internal components.
• Have the MK17 EVO2 and C370 professionally serviced at least annually or per manufacturer schedule (or ~100 dives in heavy use).