This reg system is full of features, offers SCUBAPRO reliability and is priced right. About 20 percent smaller than SCUBAPRO’s flagship MK25 but benefitting from the same core technology, the MK21 features a modern, cutting-edge-design whose size and weight make it an excellent choice for travel divers. The full-featured S560 second stage, built with a rugged nylon fiberglass case, is lightweight too, and also easy to use. Together they create the must-have reg system for recreational divers of all skill levels.
First Stage
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Air-balanced flow-through piston provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
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Polished chrome-plated marine grade brass body is close to 20% smaller than the MK25, making it an easy travel companion.
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Unique thermal exchange design with external fins optimizes freezing resistance.
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Two high pressure ports, one on each side of the body, allow the first stage to be positioned either up or down.
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Standard “smart” hose routing cap offers four low pressure ports angled for more convenient hose routing (+/- 20o).
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Optional hose routing cap increas- es routing configurations with four angled low pressure ports (0°/30°) plus a fifth centralized high-flow low pressure port, ideal for technical diving.
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Redesigned yoke allows for eas- ier mounting on a cylinder, and a redesigned cap protects internal components from water intrusion after the dive.
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Available in a 3364psi/232bar INT configuration.
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Weight: INT 232 (oz/g): 26.2/744.
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Airflow at 2900psi/200bar: (l/min/ SCFM): >7500/265.
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Intermediate pressure (psi/bar): 130-142/9.0-9.8.
Second Stage
• Air-balanced valve smoothes out the inhalation effort when diving at vary- ing depths and supply pressures.
• Lightweight techno-polymer casing helps reduce jaw fatigue and im- prove diving comfort.
• Techno Polymer inlet tube contrib- utes to reliability and long life.
• High flow exhaust valve reduces ex- halation effort to lower overall work of breathing.
• User controls include a diver-adjustable inhalation effort knob and Ventu- ri-Initiated Vacuum Assist (VIVA) dive/pre-dive switch.
• Super-flow hose features an oversized bore that allows more air to flow on each inhalation.
• Ultra-comfortable ortho- dontic mouthpiece is easy to grip yet doesn’t inhibit airflow.
• Weight: 6.1oz/172g.
• Airflow at
2900psi/200bar: 1850 l/min - 66 SCFM.
• Maximum low pressure: 203psi/14bar.