SCUBAPRO Regulators — The Lineage of the MK2
In 1963, SCUBAPRO released the MK2 — a piston first stage with a single low-pressure port, one high-pressure port, and only one moving part. That radical simplicity delivered higher airflow and more reliable breathing than anything else on the market at the time, and set a performance standard the industry is still measured against. Six decades later, the MK2 EVO remains in production with only minor modifications — a genuinely rare achievement in any engineered product category.
At DiveCatalog.com, we carry the current SCUBAPRO regulator lineup as an authorized dealer: first and second stages, complete sets, and the full range of MK-series first stages paired with SCUBAPRO's modern second stage technology.
The SCUBAPRO Regulator Range
MK25 EVO / S620 Ti — The Premier Cold-Water System
The MK25 EVO first stage delivers excellent freezing resistance, superb inhalation sensitivity, and instant air delivery on demand — SCUBAPRO's top-tier cold-water-resistant first stage. Paired with the S620 Ti second stage, lighter and more compact than the S600 but using the same-sized diaphragm for consistent airflow, the system uses a full titanium barrel, improved water circulation, and the patented XTIS (Extended Thermal Insulating System) for performance across cold, temperate, and warm water alike. An air-balanced flow-through piston and user-adjustable controls give divers genuine tuning capability across conditions.
MK17 EVO2 — Compact, Forged, Versatile
The MK17 EVO2 features a new forged body that's more compact and lighter than its predecessors, supporting both Yoke and DIN connectors and Nitrox compatibility up to 40%. Paired with the C370 second stage (a balanced design with titanium components and reinforced technopolymer casing) or the S620 Ti (titanium inlet tube, large air shower cover, reengineered exhaust T-piece for improved bubble deflection), the MK17 EVO2 covers a wide range of recreational and demanding diving conditions. An environmentally sealed diaphragm design helps reduce the impact of silt, sand, and cold-water contamination.
MK11 EVO / C370 — Compact and Travel-Ready
Built for divers and "dive-trekkers" who prioritize a travel-friendly profile, the MK11 EVO uses a chrome-plated brass body to reduce size and weight without compromising performance. Sealed internal parts, a balanced valve, and an air-balanced second stage deliver reliable breathing across depths in a genuinely compact package.
Understanding XTIS
XTIS (Extended Thermal Insulating System) is SCUBAPRO's patented freeze-resistant technology, introduced on the MK25 EVO in 2015 and now found across the brand's premium cold-water first stages. Combined with additional freeze-inhibiting internal components and coatings, XTIS is what makes the MK25 EVO genuinely suitable for ice diving and serious cold-water conditions where lesser regulators risk free-flow or freeze-up.
Choosing Your SCUBAPRO Regulator
| Diver Type |
Recommended Regulator |
Key Reason |
| Cold-water and ice divers |
MK25 EVO / S620 Ti |
XTIS freeze resistance; titanium construction; premier cold-water performance |
| Divers wanting a lighter, compact all-rounder |
MK17 EVO2 / C370 or S620 Ti |
Forged compact body; Yoke or DIN; environmentally sealed |
| Travel divers prioritizing minimal weight and bulk |
MK11 EVO / C370 |
Chrome-plated brass body reduces size and weight without losing performance |
Why Buy SCUBAPRO Regulators from DiveCatalog.com?
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Authorized SCUBAPRO dealer — genuine products, full manufacturer warranty
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Full range available — first stages, second stages, and complete matched sets
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Expert advice — our team can help you choose and properly match the right configuration
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Fast shipping — in-stock items ship within one business day
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Financing available — for premium MK25 EVO systems
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Rewards program — earn points on every purchase
Frequently Asked Questions — SCUBAPRO Regulators
Is the original MK2 from 1963 still available?
The MK2 EVO, a continuation of the original 1963 design with only minor modifications, remains in production today — a genuinely rare achievement of engineering longevity in scuba equipment.
What is XTIS and do I need it?
Extended Thermal Insulating System is SCUBAPRO's patented freeze-resistant technology found on the MK25 EVO. If you dive in genuinely cold water or ice diving conditions, XTIS provides meaningful protection against free-flow and freeze-up that standard first stages aren't built to handle. For warm and temperate water diving, it's less critical.
What is the difference between the C370 and S620 Ti second stages?
The C370 uses a balanced design with titanium components and a reinforced technopolymer casing. The S620 Ti is lighter, more compact, and uses a full titanium inlet tube with improved water circulation and bubble deflection — generally the more premium, performance-oriented option of the two when paired with compatible first stages.
Can I dive Nitrox with SCUBAPRO regulators?
Yes — the MK17 EVO2 series is compatible with Nitrox mixes up to 40%, a standard recreational nitrox range. Check the specific product listing for your model to confirm compatibility before diving.
Browse the full SCUBAPRO regulator collection above and reach out if you'd like help choosing and matching the right first and second stage for your diving.
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