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Scubapro MK25 EVO/S620TI Review: Top Breathing Regulator for Serious Divers

By: Brian Young  ● Updated: October, 2025  ● Min read

The Scubapro MK25 EVO/S620Ti is designed for divers who want strong performance in every environment. It combines Scubapro’s flagship first stage with a modern second stage built from lightweight titanium and durable composites.

This setup is aimed at experienced recreational divers and those moving toward technical or cold-water diving. The MK25 EVO handles freezing conditions without free-flow, while the S620Ti trims down weight and size compared to older S600 model.

In this review, you’ll see how it performs underwater, what features stand out, and whether it’s the right choice for your dives.

Scubapro MK25 EVO/S620TI

Our Overall Score:

4.7/5

Manufacturer: Scubapro.com

Disclaimer: This review is based on personal experiences and opinions of the author and may differ from others.

Comfort & Ergonomics

Lightweight second stage, reduced jaw fatigue, clear field of vision with redesigned exhaust.

Performance & Ease of Use

Smooth, consistent airflow at all depths; adjustable inhalation and Venturi assist work well.

Build Quality & Durability 

Chrome-plated brass and titanium components; excellent corrosion resistance and rugged build.

Maintenance 

Widely available service kits and global support; annual service recommended.

Value For Money

Premium pricing but strong long-term investment for divers needing one regulator for all conditions.

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Scubapro MK25 EVO/S620TI

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All You Need to Know About The Scubapro MK25 EVO/S620TI Regulator in 2025: Standout Features

The Scubapro MK25 EVO/S620Ti combines proven engineering with modern upgrades, making it one of the most versatile regulators available. It stands out for its breathing ease, cold-water reliability, and user-friendly design. Here are the features that make the biggest difference underwater.

MK25 EVO First Stage

The MK25 EVO is a balanced-flow piston first stage, built for consistent airflow regardless of depth or tank pressure. It uses Scubapro’s XTIS (Extended Thermal Insulating System), which improves freeze resistance and allows confident diving in cold conditions. The swivel turret with multiple high-flow ports makes hose routing straightforward, whether you dive single tanks, sidemount, or doubles.

S620Ti Second Stage

The S620Ti is lighter and more compact than the older S600, but it delivers even smoother breathing. Its titanium barrel cuts down weight while resisting corrosion, which is noticeable when carrying gear on trips. Scubapro notes a 37% reduction in work of breathing, and in practice it feels effortless at depth. The updated exhaust tee pushes bubbles out of your field of view, improving comfort and visibility.

Diver Controls

You can easily adjust how the regulator breathes. The inhalation knob fine-tunes cracking resistance, while the Venturi switch (VIVA) prevents freeflows on the surface and optimizes airflow underwater. These controls let you adapt the regulator to different dive situations with minimal effort.

Real-World Performance

On a long dive, the MK25 EVO/S620Ti feels steady, responsive, and comfortable. The airflow remains smooth from start to finish, even in colder or more demanding conditions. This mix of power, control, and efficiency is what sets it apart.

Scubapro S620TI Second Stage

Scubapro MK25 EVO/S620TI: Manufacturer's Specification

1st Stage Design:

Piston

1st Stage Type:

Balanced

Environmentally Sealed

No

Number of Ports:

2 High-Pressure (HP), 5 Low-Pressure (LP) on swivel turret

2nd Stage Type:

Pneumatically balanced 

Adjustable 2nd Stage:

Adjustable inhalation effort, Venturi switch

Materials:

Chrome-plated brass (1st), Titanium barrel + technopolymer (2nd)

Weight:

1st Stage: ~790 g / 27.9 oz; 2nd Stage: ~179 g / 6.3 oz (without hose)

Regulator Connection:

Yoke, DIN (300 bar)

Water Temp Range:

Warm, Cold, Temperate

Our Rating: Scubapro MK25 EVO/S620TI Review

Scubapro MK25 EVO/S620TI Review: Top Breathing Regulator for Serious Divers 1

Overall Score

4.7/5

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4.5/5

Comfort & Ergonomics

The second stage is compact and light, reducing jaw fatigue on longer dives. The redesigned exhaust tee directs bubbles away from your face, keeping your vision clear. The mouthpiece is soft but supportive, and hose routing is flexible thanks to the rotating turret on the first stage. Together, these details make the regulator easy to live with on multi-dive days.

5.0/5

Breathing Performance & Ease of Use

The MK25 EVO/S620Ti delivers one of the smoothest breathing experiences you’ll find. The balanced piston first stage ensures steady airflow at any tank pressure, and the S620Ti second stage keeps inhalation effort low. With the adjustment knob and Venturi switch, you can fine-tune breathing to suit different conditions. At depth, it feels effortless and natural.

5.0/5

Build Quality & Durability

Scubapro uses chrome-plated brass, stainless steel, and titanium in the build, which makes this regulator both rugged and resistant to corrosion. The titanium barrel in the second stage adds strength without extra weight. Divers who push their gear through frequent travel or colder conditions will appreciate how solid it feels.

4.5/5

Maintenance & Serviceability

Service kits are widely available, and Scubapro has a global dealer network, which makes servicing straightforward. The first stage has an external intermediate pressure adjustment, making fine-tuning easier for technicians. Like most high-end regulators, it should be serviced annually or after heavy use, but parts and support are easy to find worldwide.

4.5/5

Value for Money

The MK25 EVO/S620Ti is on the premium end of the price range, but it earns its place. Its performance is close to Scubapro’s top technical regulators, yet it’s compact and travel-friendly. For divers who want one regulator that handles both warm and cold water, it’s a strong long-term investment.

What We Like:

✅ Outstanding Breathing Performance

From shallow reefs to deeper wreck dives, the airflow feels steady and effortless. The balanced piston first stage keeps delivery smooth even as tank pressure drops, and the S620Ti second stage requires little inhalation effort. On long dives, this reduces fatigue and makes breathing feel natural.

✅ Cold-Water Reliability

The XTIS system in the MK25 EVO makes a noticeable difference in freezing conditions. Divers who venture into colder lakes or winter seas report no freeflows and consistent performance, even below 10°C. This reliability adds confidence when conditions turn demanding.

✅ Lightweight and Comfortable Second Stage

The titanium barrel keeps weight down while maintaining durability. Combined with a compact design and a redesigned exhaust tee, the second stage sits comfortably in the mouth with minimal jaw strain. Fewer bubbles around your face also mean better visibility on every breath.

✅ Flexible Hose Routing

The rotating turret on the first stage provides multiple low-pressure ports, making hose routing simple whether you’re diving a single tank or a more advanced setup. This flexibility means you can adapt the regulator to different gear configurations without hassle.

✅ Global Service Support

Scubapro’s large dealer network and widely available service kits make it easy to keep the regulator in top shape. Whether you’re traveling abroad or diving locally, finding support is straightforward.

What We Don't Like:

❌ Premium Price Tag

The MK25 EVO/S620Ti sits in the higher price bracket, which can be a stretch for divers just starting out. While the performance justifies the cost, it’s not the most budget-friendly choice.

❌ Requires Regular Servicing

Like most high-end regulators, it benefits from annual servicing to maintain peak performance. While service support is available worldwide, the cost and frequency may be higher compared to entry-level regulators.

The Verdict

The Scubapro MK25 EVO/S620Ti is a regulator built for divers who want one setup that can handle almost anything. Its breathing performance is top-tier, and the combination of a balanced piston first stage with a titanium second stage makes it both powerful and comfortable. Cold-water capability adds another layer of versatility, giving you confidence in demanding environments.

It’s best suited for advanced recreational divers, frequent travelers, and anyone looking for a long-term regulator that performs across warm and cold conditions. While the price is on the higher end, the reliability, smooth airflow, and strong global service network make it a worthwhile investment.

If you’re searching for a regulator that you won’t outgrow and can trust on dives anywhere in the world, the MK25 EVO/S620Ti is a strong choice.

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Scubapro MK25 EVO/S620TI: FAQ

Frequently Asked Questions

Does the MK25 EVO/S620Ti come with a warranty?

Yes. Scubapro offers a limited lifetime warranty on the MK25 EVO/S620Ti, provided it is purchased from an authorized dealer and serviced according to their schedule.

Can I use this regulator for technical diving setups like doubles or sidemount?

Yes. The swivel turret and multiple low-pressure ports make it suitable for doubles, sidemount, or stage bottle configurations, giving you plenty of routing options.

Is the second stage available in a left-hand configuration?

No. The S620Ti comes in a standard right-hand configuration only. However, the hose routing flexibility of the first stage makes setup manageable for most divers

Have you tried the Scubapro MK25 EVO/S620TI Regulator? What did you think? Let us know in the comments below! Happy diving!

Snippet

Scubapro MK25 EVO/S620TI Regulator
Scubapro MK25 EVO/S620TI Review: Top Breathing Regulator for Serious Divers 3

The Scubapro MK25 EVO/S620Ti is a premium regulator offering effortless breathing, cold-water reliability, and global service support. Ideal for divers who want one setup for any environment.

Product Brand: Scubapro

Editor's Rating:
4.7

Pros

  • Excellent breathing performance
  • Reliable in cold-water conditions
  • Lightweight and comfortable second stage
  • Flexible hose routing with swivel turret
  • Strong global service support

Cons

  • High price point
  • Needs regular servicing

About the author

Brian Young is a lifelong scuba diver and marine enthusiast. With years of experience exploring some of the Caribbean’s best dive sites, he brings a personal touch and insider knowledge to every article on ScubaDiverHQ.com. Brian specializes in writing in-depth dive guides, gear reviews, and travel insights that help divers of all levels plan unforgettable underwater adventures. When he’s not writing, you’ll find him in the water, guiding dives, testing new equipment, or sharing his passion for ocean conservation.

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