Which Second Stage Regulator Is Easy to Breathe for Intermediate Diving?

Our Verdict and How We Chose

Smooth breathing during a dive depends on the internal valve’s ability to maintain consistent airflow, which is why a high-flow exhaust is a primary requirement for intermediate divers.

For a more budget-conscious setup, the Oceanic Delta 5 Second Stage Regulator offers a reliable alternative, while the Hollis 200LX provides a different feel with its PVD plated brass valve.

We selected these 3 options from 16 Second Stage Regulators screened and 9 compared here at Scuba Forge. The shortlist covers a price range from $229.95 to $1249, with a median price of $229.95 for the 9 products in our comparison.

Learn how to select the best gear in the buying guide.

See if a specific model fits your needs in the audience checklist.

View all featured models side by side in the comparison table.

Full Comparison Table of Second Stage Regulators for Intermediate Diving

Prices are approximate and move frequently – check the current price before deciding.

The Scubapro G260 11.263.000 fits this topic best because it features a diver-adjustable inhalation effort knob and a high-flow exhaust valve.

Each Pick for Intermediate Diving, Reviewed in Detail

The 3 picks below are reviewed in the same order as the cards above.

Scubapro G260 11.263.000

The Scubapro G260 11.263.000 made this list because it offers high-end engineering with a 5.0 rating and a weight of 9.5oz/268g (without mouthpiece), making it suitable for various configurations including backmount and sidemount rigs.

What we like: This model features an air-balanced valve, which ensures the breathing effort remains consistent as you change depth or orientation. It includes a high-flow exhaust valve to help clear water and a diver-adjustable inhalation effort knob to customize your breathing feel.

Keep in mind: At 9.5oz/268g (without mouthpiece), this unit sits at the heavier end of the range for sidemount setups, which may be a consideration for those seeking a lighter profile.

Oceanic Delta 5 Second Stage Regulator

The Oceanic Delta 5 Second Stage Regulator is included for its reliable value and lightweight 4.8 ounces design, which fits well within the weight requirements for both small boat stability and sidemount setups.

What we like: This regulator includes a heat exchanger on the hose connection to the 2nd stage to keep the air warmer. It features a mechanical purge button for clearing water and a dynamic airflow adjustment control for smooth breathing.

Keep in mind: The weight is not stated for the mouthpiece, so you should verify the total weight if your setup has strict mass limits.

Hollis 200LX

The Hollis 200LX is a high-performance choice featuring a 5.0 rating and a 0.8 Pounds weight, providing professional-grade durability for intermediate divers.

What we like: This model uses a pneumatically balanced PVD plated brass valve for consistent flow and includes an orthodontic mouthpiece for comfort. It features a venturi lever with a soft rubber grip and ergonomic exhaust channels to facilitate easy breathing.

Keep in mind: The listing specifies this is a right-hand orientation, which may not suit divers who require a left-hand hose configuration.

The Specs That Decide an Easy Breathe Second Stage Regulator for Intermediate Diving

How high-flow exhaust valves and adjustable knobs reduce Work of Breathing

Prioritize a second stage regulator with a high-flow exhaust valve and an adjustable inhalation effort knob to ensure smooth breathing during intermediate dives. The Scubapro G260 11.263.000 features a high-flow exhaust valve and a diver-adjustable inhalation effort knob (a dial to increase or decrease the force needed to inhale), which helps maintain a consistent flow. While high-end benchmarks like the Apeks XTX are known for extreme reliability and flow, the G260 provides similar high-performance engineering. For a smoother experience, the Oceanic Delta 5 includes a dynamic airflow adjustment control to help manage resistance.

How ergonomic exhaust channels minimize the size of the air bubble

Look for a regulator with ergonomic exhaust channels to minimize the size of the air bubble and improve visibility. The Hollis 200LX includes ergonomic exhaust channels to direct air away from the face. Unlike the specialized Sidemount configurations that define the limits of the recreational market by minimizing profile, these standard options focus on directing the exhaust stream to keep the field of vision clear.

Why pneumatically balanced valves reduce inhalation resistance for easier breathing

Weigh inhalation resistance against your specific needs by choosing a model with a pneumatically balanced valve, which equalizes the pressure inside the regulator to make breathing feel effortless. The Hollis 200LX uses a pneumatically balanced PVD plated brass valve to reduce the effort required to draw air. The Scubapro G260 11.263.000 also uses an air-balanced valve to ensure the device remains easy to breathe from at various depths. Choosing a balanced valve is like having a door with a spring-loaded hinge; it stays open just enough to let you through without pushing too hard.

How metal air barrels and inlet tubes ensure consistent response times

Select a regulator with a metal air barrel and metal valve inlet tube to ensure consistent response times and reliable gas delivery. The Scubapro G260 11.263.000 includes a metal air barrel and a metal valve inlet tube to provide a stable internal path for air. Because these components are made of metal, they offer the corrosion resistance needed to ensure longevity and safety in saltwater environments. While the data does not state a specific response time for any model, these heavy-duty materials are standard for maintaining performance under pressure.

Choosing mechanical purge buttons or venturi levers for purge pressure consistency

Ensure purge pressure consistency by choosing a model with a mechanical purge button or a venturi lever. The Oceanic Delta 5 includes a mechanical purge button to clear water from the mouthpiece, while the Hollis 200LX features a venturi lever with a soft rubber grip to provide a consistent burst of air. This price gap typically reflects the shift from basic components to the high-end engineering found in the Scubapro and Hollis models.

If you are confused by technical jargon, learn common second stage regulator terms to better understand your options.

What Each Job Takes, Worked Out for These Picks

Each row is a job this page’s buyers ask about, worked out from each pick’s listed weight and a typical need for the job.

What each job takes is a typical figure, not a manufacturer claim, and every result is worked out from the pick’s listed specifications. Check your own job against them before you order.

Who Buys Second Stage Regulators, and What It Really Costs

Understand what is included and excluded in the article scope.

Explore our in-depth analysis in the detailed reviews.

Check the technical specifications in the setup and warranty notes.

For a deep dive into the high-end features, view our complete Scubapro S620 Ti analysis.

What These Second Stage Regulators Need, and What to Check on Arrival

Compatibility and Setup Requirements

Each of these second stage regulators requires a compatible first stage and a regulator hose (the tubing that connects the two units) to function. You must ensure the first stage connection type matches your existing setup before ordering.

• The Scubapro G260 11.263.000 features a metal air barrel and metal valve inlet tube, which are components that require a standard mounting interface.
• The Oceanic Delta 5 Second Stage Regulator includes a heat exchanger on the hose connection, which may affect how it interfaces with certain hose lengths.
• The Hollis 200LX features a reversible demand valve for right and left-handed hose configuration, allowing it to work with either side of your first stage.

Verifying physical dimensions and warranty details upon receiving your order

Warranty coverage and return policies vary by seller and country. Confirm the following details before the return window closes to ensure the unit is ready for use.

• Check the physical dimensions of the second stage casting to ensure it fits your preferred mouthpiece orientation.
• Verify that the hose connection type matches your regulator hose, as mismatched threads will prevent a secure seal.
• Inspect the metal valve inlet tube and PVD plated brass valve for any shipping damage, as these are the primary pressure-bearing components.

Once it arrives, perform a dry-leak test by attaching the unit to a low-pressure source to confirm the air barrel and exhaust valves move freely.

Find answers to common questions in the FAQ.

Review the essential technical specifications in the requirements.

View our final recommendations in our top picks.

Buying Questions About Second Stage Regulators for Intermediate Diving, Answered

Which scuba regulator is best for easy breathing?

The scuba regulator that provides the most effortless breathing experience depends on your specific needs for airflow and weight. The Scubapro G260 11.263.000 offers a high-flow exhaust valve to maintain smooth air movement, while the Oceanic Delta 5 Second Stage Regulator includes a dynamic airflow adjustment control for personalized breathing resistance.

Is there a specific weight limit or pressure rating I need to check before buying?

You should check the pressure rating to ensure the regulator is rated for your intended depth, such as the 350 bar (5000 psi) standard for cylinder supply. The Scubapro G260 11.263.000 states a pressure rating of 2900psi, while the pressure ratings for the Oceanic Delta 5 and Hollis 200LX are not stated in the provided data.

Which scuba regulator is best for a right-handed configuration?

The scuba regulator that suits a right-handed configuration is the Hollis 200LX, which states it features a reversible demand valve for right and left-handed hose configurations. While the Scubapro G260 11.263.000 and Oceanic Delta 5 do not state a specific hand orientation, they are available for standard setups.

Which scuba regulator is best for a budget-friendly entry point?

The scuba regulator that is best for a budget-friendly entry point is the Oceanic Delta 5 Second Stage Regulator, priced around $229.95. This model provides a 4.8 ounce weight and a heat exchanger on the hose connection for a lower price point than the high-performance Scubapro or Hollis models.

Reviewed by the Scuba Forge editorial team.