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HomeScuba DivingSCUBAPRO Introduces MK21 Piston First-Stage Regulator

SCUBAPRO Introduces MK21 Piston First-Stage Regulator

SCUBAPRO this week introduced the new MK21 piston first-stage regulator.

“The ease of breathing is what makes the MK21 outstanding,” according to SCUBAPRO. “The high rate of air flow guarantees smooth and undisturbed breathing, even when diving deep and with low cylinder pressure. The external fins optimise the heat exchange providing the MK21 with an excellent cold water resistance. The size of MK21 is remarkable: The MK21 is 16mm smaller as the MK25, but the performance is by no means reduced. Through the intelligent hose layout this impressive 1st stage allows easy identification and perfect positioning.”

The regulator’s “optional head” makes the MK21 an “ideal 1st stage for technical diving. The regular head can be replaced with a 5 LP-port head for the optimal technical diving hose configuration.

Among the MK21’s features:

The Concept

• Compact size (only 76mm)
• Brand new medium piston 1st stage
• Replaceable head for unique hose configuration
• AF System for best cold water performance
• LP and HP hoses smart layout
• Easy maintenance
• Perfect symbiosis between performance and sensitivity
• 2 HP Ports / 4 LP Ports (optional head with additional high flow LP TOP port)

The Design

• Unique design
• Streamline shape
• Polished chrome finishing
• New cap matching the style
• Very compact forged body (only 46mm diameter)
• External fins for optimal thermal exchange and anti-freezing resistance
• Re-designed yoke and cap

Functional Highlights

• Optional replaceable head for optimal positioning with 4 LP routing configurations (0°/30°) – ideal for technical diving
• Standard head with 4 LP hose routing (+/- 20°)



John Liang
John Liang
John Liang is the News Editor at He first got the diving bug while in High School in Cairo, Egypt, where he earned his PADI Open Water Diver certification in the Red Sea off the Sinai Peninsula. Since then, John has dived in a volcanic lake in Guatemala, among white-tipped sharks off the Pacific Coast of Costa Rica, and other places including a pool in Las Vegas helping to break the world record for the largest underwater press conference.