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Description
Description
The Scubapro MK25 EVO first stage is a regulator component for scuba diving gear, delivering a fast breathing response and reliable air on demand for underwater diving performance in challenging conditions.
Its patented XTIS Extended Thermal Insulating System isolates the mechanical elements from the cold, increasing freezing resistance by 30 percent without compromising breathing performance. Key insulation system components are visible in blue to indicate the enhanced cold-water protection.
Designed for dependable underwater use, the MK25 EVO features an air balanced flow-through piston in a chrome-plated brass body, anti-freeze protection, and a suite of insulation enhancements that work together to improve cold-water performance and breathing reliability in extreme temperatures.
Port configuration supports versatile setup: two opposing high-pressure ports allow orientation up or down, and five high-flow low-pressure ports on a swivel turret maximize hose routing options. External intermediate pressure adjustment enables quick, precise tuning for a range of diving scenarios. Available in either 3364psi/232bar INT or 4350psi/300bar DIN configurations.
For scuba enthusiasts and underwater gear configurations, the MK25 EVO offers robust airflow and precise performance: airflow at 2900psi/200bar > 8500 l/min / 301 SCFM; intermediate pressure 133-142 psi / 9.2-9.8 bar. Weight is INT 27.9 oz / 790 g and DIN 20.1 oz / 570 g.
Features
Features
- Air balanced flow-through piston in a chrome-plated brass body provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
- Patented XTIS (Extended Thermal Insulating System) fully isolates the mechanical elements from the cold, increasing freezing resistance 30 percent over the previous MK25 without compromising breathing performance. Key insulation system components are visible in blue.
- New spring insulating coating, body insulating bushing, anti-freeze cap, bigger body and cap thread all work in concert with the XTIS to improve cold-water performance.
- Anti-freeze protection radically increases breathing reliability when diving in the most extreme water temperatures.
- Two opposing high-pressure ports allow the first stage to be positioned either up or down.
- Five high-flow low-pressure ports on a swivel turret maximize hose routing options.
- External intermediate pressure adjustment enables technicians to fine-tune performance quickly and easily.
- Available in either 3364psi/232bar INT or 4350psi/300bar DIN configurations.
- Weight: INT 27.9 oz / 790 g; DIN 20.1 oz / 570 g.
- Airflow at 2900psi/200bar: >8500 l/min / 301 SCFM.
- Intermediate pressure (psi/bar): 133-142 / 9.2-9.8.
Payment & Security
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WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
ScubaPro MK25 EVO vs MK17 EVO2: which first stage should I choose?
The MK25 EVO is a balanced piston first stage — it delivers the highest airflow and instant response, and it is the choice of many performance-focused and warm-to-cold water divers. The MK17 EVO2 is a sealed diaphragm first stage — its internals are isolated from water, which makes it the traditional pick for very cold water and silty or salty conditions with less maintenance sensitivity. Both are excellent; choose the MK25 EVO for maximum performance and adjustability, the MK17 EVO2 for a fully sealed set-and-forget workhorse.
Should I order my ScubaPro regulator in DIN or yoke?
Yoke (INT) is the most common fitting on rental tanks in North America and the Caribbean, so it is the simplest choice if you mostly dive at resorts. DIN screws directly into the tank valve, is rated for higher pressures, and is standard in Europe and technical diving — and a DIN regulator can use a simple adapter on yoke tanks, which makes DIN the more flexible long-term choice for traveling divers. ScubaPro sells both versions, and a yoke regulator can later be converted to DIN by an authorized dealer using a genuine ScubaPro conversion kit (DIN owners going the other way simply use a DIN-to-yoke adapter — no conversion needed).
What is the difference between the MK25 EVO and the original MK25?
The EVO generation added ScubaPro's XTIS (Extended Thermal Insulating System), which improves freezing resistance in cold water, along with updated materials and finishes. The core balanced-piston design that made the MK25 famous is unchanged — the EVO is the same performance with better cold-water protection.
Is the S620Ti second stage good for cold water, and what does the Ti mean?
Ti refers to the S620Ti's titanium components — the inlet tube and barrel are full titanium, making the second stage ultralight and highly corrosion-resistant, housed in a rugged fiber-reinforced technopolymer casing. It is the successor to ScubaPro's legendary S600: smaller and lighter, but with the same-size diaphragm for effortless airflow in all conditions. Paired with the MK25 EVO first stage, the system is cold-water rated.
How often does a ScubaPro regulator need service?
ScubaPro's official recommendation is a full service by an authorized ScubaPro technician every 2 years or 100 dives, whichever comes first. If you dive heavily (100+ dives a year), ScubaPro recommends an inspection every 6 months and an overhaul annually. Staying on schedule also keeps you eligible for ScubaPro's Parts For Life program — free service parts for the original owner when the regulator is registered and purchased as part of a qualifying package from an authorized dealer. As an authorized ScubaPro dealer, we can help with registration and service when it is due.
