Oceanic Delta 5 Regulator Review: Supports Nitrox Up to 40% Oxygen

Delta 5 Regulator Overview

Oceanic Delta 5 Second Stage Regulator manages airflow for divers who need to keep their backmount or sidemount rig weight under 12oz.

Divers using a hookah setup can maintain a balanced profile because this unit weighs only 4.8 ounces. The Oceanic Delta 5 Regulator provides this lightweight profile while offering a dynamic airflow adjustment control to manage breathing resistance, which is the work of breathing required to inhale. It also features a dive/pre-dive switch to toggle between different breathing modes.

This product was chosen for a full review because it was one of the most-rated products that passed screening, having 6 buyer ratings, the 4th most of the 16 screened. We evaluate the second stage regulators we compared based on listing data to determine which models meet specific requirements. This review is for users who prioritize weight savings and versatile airflow controls.

The Short Answer on the Delta 5 Regulator

Best for: you need to minimize the weight of your backmount or sidemount rig without sacrificing Nitrox compatibility up to 40% oxygen by volume.

The Oceanic Delta 5 Regulator is a practical choice at the $229.95 mark.

• Pro: Weighs only 4.8 ounces, which is well below the 12oz limit for a budget backmount setup.
• Pro: Includes a heat exchanger on the hose connection to the 2nd stage to help manage gas temperature.
• Pro: Features a dive/pre-dive switch for easy adjustment of the airflow.
• Con: The 5.0 rating is based on only 6 buyer ratings, which provides a very small sample size for assessing long-term reliability.
• Con: The 8 x 7 x 3 inch dimensions may be too large for some ultra-compact configurations.

Don’t buy this if: you require a regulator that supports higher oxygen concentrations than 40% for technical Nitrox diving.

Price assessment: The $229.95 price is fair for a second stage that includes both a heat exchanger and dynamic airflow controls.

You should also consider the best second stage regulator for full face diving mask configurations.

Full technical specifications for this Second Stage Regulator

The weight of 4.8 ounces measures the heaviness of the unit, which is sufficient to meet the 8 to 11oz requirement for sidemount setups.

What These Specifications Let You Do

Nitrox Compatibility up to 40%

You can take this regulator to a depth of 130 feet, which is the maximum depth rating provided for the Oceanic Delta 5 Second Stage Regulator. While many recreational regulators are standard for air, this model supports Nitrox up to 40% oxygen by volume without requiring special preparation or cleaning of the components.

The lack of required component cleaning for Nitrox means you can switch gas mixes more efficiently during a dive. Because the device is rated for 130 feet, it supports the depth requirements for most recreational and some technical diving profiles using these gas blends.

How dynamic airflow adjustment control provides personalized breathing resistance

You can adjust the breathing flow easily using the dynamic airflow adjustment control, which allows for personalized inhalation resistance. This feature is designed to provide a consistent feel, helping to prevent the uneven breathing patterns that can occur with fixed-setting regulators.

The adjustment control allows you to tune the device to your specific breathing style, whether you prefer a softer or firmer feel. By providing this level of customization, the Delta 5 Regulator helps maintain a steady work of breathing—the effort required to inhale—across different water temperatures and depths.

How an integrated heat exchanger manages gas temperature on the hose

The Delta 5 Regulator includes a heat exchanger on the hose connection to the second stage to manage the temperature of the gas. A heat exchanger is a component that transfers heat from the gas to the surrounding water, which helps prevent the gas from feeling too cold during inhalation.

This feature is particularly useful in colder water where gas expansion causes rapid temperature drops. By warming the gas before it reaches your mouth, the heat exchanger helps maintain a more comfortable breathing experience and reduces the risk of moisture accumulation caused by rapid temperature changes.

Common Buyer Jobs Checked Against the Delta 5 Regulator’s Specs

The Delta 5 Regulator against the jobs buyers ask about, worked out from its listed weight and a typical need for each job.

Specialized setups are available in our guide to the best second stage regulator for hookah diving.

The Delta 5 Regulator Against Similar Second Stage Regulators

The Delta 5 Regulator provides a lightweight solution for specialized configurations, weighing only 4.8 ounces.

• The Atomic Aquatics M1 1st & 2nd Stage Regulator is $10.95 cheaper than this model.
• The Oceanic Alpha 10 Second Stage Regulator costs $75 less than the Delta 5 Regulator.
• The IST O60 Adjustable Second Stage Regulator is $81.20 cheaper than this model.
• The Rego LV4403B66R Low Pressure Second Stage Regulator is $84.95 cheaper than the Delta 5 Regulator.
• The Sea Elite Scout Compact Octopus is $100 cheaper than this model.
• The Delta 5 Regulator holds the highest rating of the two products in this comparison that provide a rating.

If you require a lower price point than the $229.95 mark, the Sea Elite Scout Compact Octopus is a more affordable option.

If you need a high-performance alternative, read our full review of the Hollis 200LX.

Divers seeking a compact setup can view our spec breakdown of the Third Lung Regulator.

Setting Up This Second Stage Regulator, and What Support Covers

Getting Your Delta 5 Regulator Ready

You need a compatible scuba cylinder to use this second stage regulator. Because the listing does not specify the connection type, you must verify the connection style on the unit before you begin.

1. Unpack the Delta 5 Regulator and inspect the body for any visible defects.
2. Check the hose connection to ensure the heat exchanger is securely attached.
3. Verify that the dive/pre-dive switch is in the correct position for your needs.
4. Connect the regulator to your cylinder and check for leaks at the connection point.

Warranty and Support: What to Check

Warranty coverage and return policies vary depending on the seller and your country. Confirm these specific details before the return window closes:

• Verify the connection type matches your cylinder valve to ensure a secure fit.
• Check the condition of the heat exchanger and purge button to ensure they move freely.
• Confirm the presence of necessary replacement O-rings to maintain airtight seals.
• Identify the specific regulator hose required for your setup to ensure it matches the connection.

Test the dynamic airflow adjustment control and the mechanical purge button immediately upon arrival while the return window is still open.

Second Stage Regulator Buying Questions Answered

Does the Oceanic Delta 5 Second Stage Regulator work with Nitrox?

Yes, the Oceanic Delta 5 Second Stage Regulator is Nitrox compatible up to 40% oxygen by volume. This means you can switch to a Nitrox mix without needing extra equipment, provided your gas blend stays within that 40% limit.

How does the Oceanic Delta 5 Second Stage Regulator clear water?

The Oceanic Delta 5 Second Stage Regulator includes a mechanical purge button to clear water from the mouthpiece. This feature allows you to manually expel water to ensure clear breathing, which is a standard safety requirement for many divers.

Is the Oceanic Delta 5 Second Stage Regulator heavy enough to stay in place?

The Oceanic Delta 5 Second Stage Regulator weighs 4.8 ounces, which is light enough to minimize weight on a backmount rig or a sidemount setup. Will it stay balanced on your face? At 4.8 ounces, it provides a low-mass profile that helps keep the regulator from pulling on your mask or shifting during a dive.

Is the Oceanic Delta 5 Second Stage Regulator a good value?

For a budget backmount setup, the Oceanic Delta 5 Second Stage Regulator offers a weight of 4.8 ounces for around $229.95. While it holds a 5.0 rating from 6 buyer ratings, a sample this small settles nothing regarding long-term reliability, so you should focus on the 4.8 ounce weight to determine if it fits your rig’s balance needs.

New users can learn more by reading the second stage regulator explained guide.

Is the Delta 5 Regulator Right for You?

Who the Delta 5 Regulator suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Second Stage Regulator

In November 2026 the Delta 5 Regulator was listed at $229.95. Prices move, so read that as a snapshot, not a quote.

Second stage regulators are sold by the retailers below – we do not track which of them has the Delta 5 Regulator in stock, so check availability and the current price with the retailer before making a trip.

• DiveInn (online only) — extensive inventory of international scuba brands
• Triton Diving (online and physical stores) — specialist staff and local equipment servicing
• Scubapro (online and physical stores) — official manufacturer outlet for brand-specific parts and gear
• Amazon (online only) — broad availability of entry-level and consumer brands
• Dick’s Sporting Goods (online and physical stores) — physical locations for immediate pickup of common brands
• ScubaGear.com (online only) — wide selection of major brands and technical gear

Final Verdict on the Delta 5 Regulator

If you need to minimize weight for a sidemount or backmount rig, the Delta 5 Regulator weighs 4.8 ounces. This weight is low enough to meet the 8 to 12 ounce requirements for these specific configurations.

You should choose the Oceanic Delta 5 Regulator if you require a lightweight second stage that supports Nitrox up to 40% oxygen by volume. The 4.8-ounce weight makes it suitable for a variety of setups, including hookah or small boat configurations where keeping the gear under 14 ounces is a priority. The device includes a heat exchanger on the hose connection to the 2nd stage, which helps manage temperature during use.

You should choose the Oceanic Delta 5 Regulator if you need a compact, lightweight second stage for a specialized rig. At 4.8 ounces, the Delta 5 Regulator provides a low-mass option that fits within the 8 to 11 ounce requirements for sidemount setups or the 12 ounce limit for budget backmount rigs. It supports Nitrox up to 40% oxygen by volume without requiring special preparation or cleaning.

You should choose the Oceanic Delta 5 Regulator if you want a lightweight second stage for a personalized setup. The Delta 5 Regulator weighs 4.8 ounces, which is well under the 9 to 13 ounce limit for left-handed configurations. It also features a dynamic airflow adjustment control to help manage breathing during your dive.

You should choose the Oceanic Delta 5 Regulator if you are looking for a light and functional second stage. The Delta 5 Regulator weighs 4.8 ounces, which is sufficient for staying balanced on a small boat where a weight of under 14 ounces is preferred. This model also includes a mechanical purge button and a dive/pre-dive switch.

You should choose the Oceanic Delta 5 Regulator if you need a budget-friendly, low-weight second stage. The Delta 5 Regulator weighs 4.8 ounces, easily meeting the 12-ounce weight limit for budget backmount rigs. It is Nitrox compatible up to 40% oxygen by volume and requires no special preparation for that use.

If you need a lightweight second stage for a specialized setup, the Oceanic Delta 5 Regulator is a suitable choice at the $229.95 price point.

The Delta 5 Regulator weighs 4.8 ounces, providing a significant weight advantage for sidemount, backmount, or left-handed configurations. It also holds a 5.0 rating from 6 buyer ratings, though this small sample size provides limited context on long-term reliability.

Skip it if: You require a regulator with a higher Nitrox oxygen percentage than 40% or need a different connection interface than the standard provided.