Best Second Diving Regulators of 2026

Name: SEAC PX100 Emergency Scuba Diver Regulator Set
Brand: SEAC

Luke Dobson

Last Updated: 9 Feb 2026

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Diving enthusiasts know the importance of having a reliable regulator to ensure their safety underwater. Second diving regulators are a crucial backup system for divers in case their primary regulator fails or malfunctions. These regulators are designed to provide a reliable and consistent supply of air to divers, even in the most challenging conditions. With features such as adjustable airflow and environmental sealing, second diving regulators provide an added layer of safety for divers. Whether you're a beginner or an experienced diver, having a dependable second diving regulator is essential for a safe and enjoyable diving experience.

At a Glance: Our Top Picks

#TOP 1

SEAC PX100 Emergency Scuba Diver Regulator Set

9.8

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#TOP 2

Scuba Choice Scuba Diving Palantic AS103 YOKE Regulator Adjustable Second Stage

9.7

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#TOP 3

Hollis 200LX Second Stage Regulator

9.5

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Top 10 Second Diving Regulators

#TOP 1

SEAC PX100 Emergency Scuba Diver Regulator Set

SEAC
0350097000004A
nero
230 INT

SEAC SET PX100, Emergency Scuba Diver Regulator and Octopus

The SEAC PX100 Regulator Set is designed for divers seeking reliability and performance. Its simple piston first stage features one high-pressure outlet and four low-pressure outlets, ensuring a consistent air supply during your dives. You can adjust the breathing effort and the Venturi Effect, which helps optimise your air intake based on your activity level. Additionally, the exhaust duct effectively prevents water from entering the second stage, even in strong currents, enhancing your safety and comfort underwater.

9.8

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What We Like

Reliable performance underwater
Adjustable breathing effort
Water infiltration prevention
Functional design
Made in Italy quality

#TOP 2

Scuba Choice Scuba Diving Palantic AS103 YOKE Regulator Adjustable Second Stage

Palantic
SCR-02-YOKE-AJ

Scuba Choice Scuba Diving Palantic AS103 YOKE Regulator Adjustable Second Stage with 27" Hose

Features

Comfortable Silicone Mouthpiece
High Quality Regulator First Stage And Second Stage With 27" Hose
Large Purge Button

9.7

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#TOP 3

Hollis 200LX Second Stage Regulator

Hollis
240.2000.LX
Black

Hollis 200LX Second Stage Regulator

Features

The Hollis 200LX Second Stage Is Pneumatically Balanced With A PVD-Plated Brass Valve That Provides Smooth And Easy Breathing.
The Valve And Every Other Metal Component Of The 200LX Is “PVD” Industrial Plated. Added To Outperform And Outlast Any Other Regulator Finish.
The Diver Adjustable Inhalation Knob Allows The Diver To Customize The Inhalation Effort, Making It Easier Or Stiffer. An Ergonomic Exhaust Design Channels Bubbles Away From Field Of View And Reduces Exhaust Effort.

9.5

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#TOP 4

Cressi Compact Pro MC9/SC Diving Regulator

Cressi
HX782100
Metallic

Cressi Compact Pro MC9/SC DIN Hiper Balanced Regulator-Made in Italy

The Cressi Compact Pro Regulator is designed for divers seeking a lightweight and efficient option. The hyper-balanced diaphragm in the MC9-SC first stage ensures smooth airflow, making your dives more enjoyable. Its featherweight second stage, crafted from techno-polymers, helps to reduce jaw fatigue, allowing you to focus on your underwater experience. The self-lubricating internal coating enhances durability and performance, ensuring you can rely on this regulator during your adventures. Ideal for travel, it packs maximum performance into a compact design.

9.3

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What We Like

Lightweight and travel-friendly
Reduces jaw fatigue
Durable internal coating
Smooth airflow

#TOP 5

Cressi AC2 Compact Plus Diving Regulator Set

Cressi
HY787051
Black

Cressi AC2 Compact Plus Octopus XS Int Diving Regulator - Black

The Cressi AC2 Compact Regulator is an excellent choice for divers, offering maximum performance in a compact design. This regulator features a first stage AC2 and two second stages, making it suitable for beginners, diving schools, and rental use. Its octopus model has a distinctive yellow front cover, ensuring easy identification under water. Additionally, the longer hose length of 100 cm provides greater flexibility and comfort during dives, enhancing your overall diving experience.

9.1

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What We Like

Compact and lightweight design
Ideal for beginners and rentals
Easy identification with yellow cover
Longer hose for added comfort

#TOP 6

SEAC SET PX100, Emergency Scuba Diver Regulator and Octopus

SEAC
0350097000003A
nero
230 DIN

SEAC SET PX100, Emergency Scuba Diver Regulator and Octopus

Features

Simple Piston First Stage Consists Of One High-Pressure Outlet And 4 Low-Pressure Outlets. Second Stage Has A Simple And Functional Design.
Set Consisting Of The SEAC PX100 Regulator With INT Or DIN 230 BAR Connection And The SEAC PX100 OCTO Emergency Second Stage
Number Of HP Ports: 1. Number Of LP Ports: 4. All Components Are Made In Italy.

9.1

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#TOP 7

Cressi Octopus Compact Scuba Regulator

Cressi
HX789000
Yellow
Standard

Cressi Octopus - 2nd Stage Scuba Diving Regulator

The Cressi Octopus Regulator features a compact design with a distinctive yellow front cover and a longer hose, measuring 100 cm for added convenience. This longer hose allows for greater flexibility during dives. Also, it channels a flow of pilot air to the mouthpiece, enhancing your breathing performance underwater. Additionally, the upper part includes a flow deviator that optimises the Venturi effect, giving you better control over your inhalation efforts with a dive/pre-dive function. This means you can adjust your breathing with ease, making your diving experience more enjoyable.

9.1

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What We Like

Enhanced breathing performance
Longer hose for flexibility
Easy dive/pre-dive adjustment
Compact and lightweight design

#TOP 8

Dive Rite Dive Rite XT2 Second Stage Only Left Hand

Dive Rite
RG5200-LEFT
Black

Dive Rite Dive Rite XT2 Second Stage Only (No Hose) Left Hand

Features

XT2 Second Stage Regulator Pneumatically Balanced Design Gives Consistent Gas Pressure For Easy Inhalation Venturi Assist Directs Airflow From The Valve Directly To The Mouthpiece Producing Smooth Inhalation Easy Grip Dive/pre-Dive Switch Avoids Free At Surface And Is Easy To Use With Gloves Adjustable Design Helps Diver Fine Tune Cracking Pressure So Breathing Resistance Matches Diver Personal Preference Deflection Ring Works To Maximize Performance While Deterring Free Flow Orthdontic Mouthpi
The XT Regulator Welcomes A New Generation Of Regulator Performance At Dive Rite. An Elite Performer, The XT's Advance, Patented Design Earns Top Marks From Mike Ward Of Dive Lab. With Work Of Breathing At Less Than 1.0 J/L, The XT Performs Right Alongside Premier Regulatorson The Market Today.
Using Oxygencompatible Materials And Assembly Processes That Are Today Industry Standard, The XT Is Suitable For Oxygen Enriched Gas Mixtures.* *The XT2 Is Suitable For Oxygen Use Only If Precautions Are Taken. Diver Must Use Oxygen Compatible Materials, Keep The Regulator Clean From Contaminants During Assembly And Use And Open The Tank Valve Slowly.

9.0

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#TOP 9

Cressi MC9/XS Compact Diving Regulator

Cressi
HX783051
Black

Cressi MC9/XS Compact Regulator - Regulator for Diving, INT, Black, Adult Unisex

The Cressi Compact Regulator features a hyper-balanced diaphragm in its MC9 first stage, which ensures reliable performance at various depths. Its featherweight second stage, made from lightweight techno-polymers, significantly reduces jaw fatigue, allowing you to dive comfortably for extended periods. Additionally, the self-lubricating internal coating enhances durability and efficiency, making your dives smoother. Designed for travel, this regulator packs impressive performance into a compact size, ensuring that it’s easy to transport without compromising on quality.

9.0

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What We Like

Lightweight design for easy travel
Reduces jaw fatigue while diving
Durable self-lubricating coating
Compact size maximises performance
Reliable performance at various depths

#TOP 10

Dive Rite XT2 Second Stage

Dive Rite
RG5250-RIGHT
Black

Dive Rite XT2 Second Stage, Right (Typical Side), 2021 Model (Rubber Cover)

Features

Venturi Assist Directs Airflow From The Valve Directly To The Mouthpiece Producing Smooth Inhalation
Pneumatically Balanced Design Gives Consistent Gas Pressure For Easy Inhalation
Orthdontic Mouthpiece Reduces Jaw Fatigue On Long Dives

9.0

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Editor's Notes

During our second diving regulator research, we found 29 second diving regulator products and shortlisted 10 quality products. We collected and analyzed 5,205 customer reviews through our big data system to write the second diving regulators list. We found that most customers choose second diving regulators with an average price of £274.05.

The second diving regulators are available for purchase. We have researched hundreds of brands and picked the top brands of second diving regulators, including SEAC, Palantic, Hollis, Cressi, Dive Rite.

Written by

Luke Dobson

Luke is a runner, a climber, hiker, hunter, and a lot more. Luke Dobson is Celtic-born and has lived most of his life in Scotland. However, his sporting endeavours have taken him to several countries around Europe. He serves as a tour guide for countless companies and owns a couple of gyms and recreational centres in Scotland. Luke Dobson is proficient in 7 different languages. He maintains many sport article columns where he shares his wealth of experience in the sport industry.