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Regardless of which type of alternate air source you select, remember that its performance will depend on the ability of the regulator first stage to deliver air, particularly when it is supplying two second stages and a power inflator. The bottom lines: Given the type of diving you plan to do, how will it work for you in a worst-case scenario? How much risk are you willing to accept? If you dive solo, under demanding conditions or in overhead environments, the greater your need for a completely independent air source and a high-performance regulator as your alternate air source.
(Excerpt used from New Diver Magazine)
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Demonstration Video:
Video: Submersible System磗 Spare Air


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Mfg Part Number :
300PKYEL

Submersible Systems Spare Air Pack

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Submersible Systems Spare Air PackCustomer reviews

 



Every Spare Air we sell comes complete with:

For more information click here

 

UPGRADES:
Nitrox 3.0 CF - Nitrox ready up to 40% EAN Add $18.00
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Mini Pressure Gauge For Spare Air $49.95

Spare Air Travel Pack $15.96

Divers Tool Master $19.95

  Retail:
$299.00

You Pay:
$259.95

You Save:
$39.05

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Demonstration Video:
Video: Atomic-SS1-Scuba-Octo

Mfg Part Number :
14-0001-3P

Atomic SS1 Octo

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Atomic SS1 OctoCustomer reviews

 



"Scuba Lab Testers Choice!"

 

And the reviews are in:
"No doubt about it. Atomic has raised the bar with the SS1, creating the first safe second that really could be compared to a high-performance primary. And the best news - it will fit on most any brand of BC, thanks to a unique adapter device." - Sport Diver magazine

"The SS1 breathes better than many primary use regulators and generated the best overall simulator performance among the integrated inflator/regs...and earned the highest ergonomic scores of all the units we tested" - Scubalab

 

UPGRADES:
Titanium Add $125.00
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Ideations Dive Alert Plus V.2 Type III $76.50

Atomic Deluxe Regulator Bag $71.50

Angled Hose Adapter for Seaquest BCs $14.78

  $254.00

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Mfg Part Number :
02-0005-3P

Atomic Ti2 Titanium Octo

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Atomic Ti2 Titanium OctoCustomer reviews

 



UPGRADES:
Atomic Deluxe Regulator Bag Add $71.50
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Divers Tool Master $19.95

Breakaway Octo Holder $5.95

Scuba Equipment Care & Maintenance Book $19.95

  $350.00

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Demonstration Video:
Video: Aqua Lung Legend Scuba Regulator Video Review

Mfg Part Number :
129720

Aqua Lung Legend Octo

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  • Excellent coldwater performance due to highly efficient heat exchanger surrounding the valve
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • Venturi switch to prevent unwanted free-flow when not in use
  • Bright "Hi-Viz" 39" yellow hose and 2nd stage cover for easy identification
  • LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS
UPGRADES:
Scuba Deluxe Round Protective Regulator Bag Add $29.95
Options: 



Breakaway Octo Holder $5.95

Scuba Equipment Care & Maintenance Book $19.95

Scuba Tool Master $19.95

  $235.00

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Demonstration Video:
Video: Oceanic Slimline 2 Scuba Diving Octo Video Review


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Mfg Part Number :
40.4242.53

Oceanic Slimline 2 Octo

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Oceanic Slimline 2 OctoCustomer reviews

 



  • Brand new & completely redesigned with MaxFlex Hose
    Not like most other sites that sell the old discontinued model with a standard regulator hose
  • MaxFlex hose - lightweight, flexible, double braided hose designed to
    outperform and outlive traditional rubber hoses
  • Streamline flat design
  • Nitrox compatible to 40% (The recreational limits of Nitrox)
  • Stows perfectly in BCD pocket
  • Large Purge button
  • Tuned to resist unwanted freeflows
  • Bright "Hi-Viz" yellow hose and 2nd stage cover for easy identification
  • LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS
UPGRADES:
Oceanic Round Regulator Bag Add $39.95
Options: 



Divers Tool Master $19.95

Scubamax Octo Holder $5.95

Ergonomic Supersoft Silicone Mouthpiece $9.95

  $139.95

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Mfg Part Number :
RG330

XS Scuba Airwave Plus Inline Octo

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XS Scuba Airwave Plus Inline OctoCustomer reviews

 



"Scuba Lab Testers Choice and Best Buy!"
  • The Airwave Plus inline Octo is positioned at the end of the Buoyancy Compensator hose
  • Eliminating hose clutter, because you use the same hose to supply both the power inflator and your alternate air source, also known as safe-2nd or Octo
  • Compatible with all BC's by simply attaching to any power inflator
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • The worlds only Inline Octo with "Diver Adjustable" venturi to prevent unwanted free-flow
  • Bright "hi viz" yellow accents for easy identification
  • Rugged, reliable and affordable
  • Exceptional breathing performance
  • Compact, light weight design
  • Orthodontic mouthpiece
  • FULL MANUFACTURER'S WARRANTY
UPGRADES:
Ideations Surface & Underwater Air Horn Dive Alert Plus V.2 Type I Add $67.95
Options: 



Scuba Equipment Care & Maintenance Book $19.95

Deluxe Protective Regulator Bag $29.95

Divers Tool Master $19.95

  Retail:
$180.00

You Pay:
$159.95

You Save:
$20.05

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Mfg Part Number :
11.331.200

ScubaPro R195 Octo

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ScubaPro R195 OctoCustomer reviews

 



  • Brand new & completely redesigned
    Not like most other sites that sell the old discontinued model
  • Compact and lightweight 2nd stage
  • Optimal flow design (OFD) valve for reliable high airflow
  • "Diver Adjustable" venturi to prevent unwanted free-flow
  • Large Purge button
  • Nitrox compatible to 40% (the recreational limits of nitrox)
  • Bright "Hi-Viz" yellow hose and 2nd stage cover for easy identification
  • 39" hose
  • FULL MANUFACTURER’S WARRANTY
UPGRADES:
ScubaPro Tech + Instrument Regulator Bag Add $45.00
Options: 



Scuba Tool Master $19.95

Breakaway Octo Holder $5.95

Deluxe Diver Tool And Repair Kit $34.95

  $209.00

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Mfg Part Number :
750-6206

Zeagle Pony Bottle System

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Zeagle Pony Bottle SystemCustomer reviews

 



UPGRADES:
Scuba Tank Carrier Add $12.95
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Polar Fleece Beanie $10.00

Deluxe Diver Tool And Repair Kit $34.95

Scuba Deluxe Round Regulator Bag $29.95

  $498.00

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Mfg Part Number :
750-62

Zeagle Pony Bottle System 创Demo创

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UPGRADES:
Scuba Tank Carrier Add $12.95
Options: 



Polar Fleece Beanie $10.00

Deluxe Diver Tool And Repair Kit $34.95

Scuba Deluxe Round Regulator Bag $29.95

  Retail:
$498.00

You Pay:
$375.00

You Save:
$123.00

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Mfg Part Number :
416504

Mares Abyss Octo

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Mares Abyss OctoCustomer reviews

 



  • Brand new & completely redesigned
  • Not like most other sites that sell the old discontinued model
  • Free Octo Holder
  • Specially designed mesh grid 2nd stage cover to prevent unwanted free-flow even in the strongest currents
  • Grill design optimizes the flow of water around the second stage diaphragm, minimizing the likelihood of free-flow
  • High performance in all temperature extremes - including Ice diving!
  • VAD (Vortex Assisted Design) by-pass system for effortless, natural breathing under all conditions
  • Bright "Hi-Viz" yellow hose for easy identification
  • Light weight and compact design
  • DFC (Dynamic Flow Control) for improved performance at any depth
  • Oversized purge button is extremely easy to use, even with heavy gloves
  • FULL MANUFACTURER'S WARRANTY
UPGRADES:
Scuba Deluxe Round Protective Regulator Bag Add $29.95
Options: 



Mares Cruise Scuba Regulator Bag $23.95

Scuba Beach Towel $9.95

Scuba Tool Master $19.95

  Retail:
$280.00

You Pay:
$259.95

You Save:
$20.05

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Mfg Part Number :
SR9902

Sherwood Brut Octo

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Sherwood Brut OctoCustomer reviews

 



      
  • Hi-Viz yellow face cover
  • Simple to maintain
  • Larger diaphragm for optimal response to inhalation
  • Larger exhaust valve for decreased exhalation resistance
  • Precision - ground stainless steel cam and Delrin lever for smooth effortless breathing
  • High impact housing for rugged applications
  • FULL MANUFACTURER’S WARRANTY
UPGRADES:
Akona Regulator Bag Add $39.95
Options: 



Divers Tool Master $19.95

Ergonomic Supersoft Silicone Mouthpiece $9.95

Breakaway Octo Holder $5.95

  Retail:
$147.00

You Pay:
$124.95

You Save:
$22.05

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Mfg Part Number :
HEED-3

Submersible Systems Heed 3 - Military Emergency Egress Device

Submersible Systems Heed 3 - Military Emergency Egress DeviceCustomer reviews

 



  • Pressure Gauge Indicator included
  • More than 1lb lighter than competing models
  • Under 9" tall, the HEED 3 is the smallest emergency breathing device on the market
  • Compactdesign is easy to use
  • Simple design is easy to repair and maintain
  • Always-on design is ready to deliver air when you need it
  • Refillable from an air compressor or SCUBA tank (using required adapter -see below to order)
  • Over 25 years of service to the military, tested and approved by the US Navy
  • Over 250,000 units sold worldwide since 1979
  • Includes custom holster to attach to a modular-type vest, ideal for Switlik Modular Aircrew Vest
  • Mouthpiece cover and lanyard included
  • 1.7 CF - 30 Breaths at the surface
  • FULL MANUFACTURER’S WARRANTY
UPGRADES:
Submersible Systems Spare Air Yoke Refill Adapter Add $44.95
Options: 



Neoprene Vest with Mouthpiece Cover $79.95

Spare Air Travel Pack $15.96

Scuba Tool Master $19.95

  $299.00

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Mfg Part Number :
IR-3

TUSA Duo-Air

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TUSA Duo-AirCustomer reviews

 



  • Nitrox compatible to 40% (The recreational limits of Nitrox)
  • Inflator integrated secondary air source
  • The Duo Air is positioned at the end of the Buoyancy Compensator hose
  • Eliminating hose clutter, because you use the same hose to supply both the power inflator and your alternate air source, also known as safe-2nd or Octo
  • Compatible with all BC's - will NOT fit BC's made by Aeris, Aqua-Lung, Cressi, Dacor, Oceanic, SeaQuest, TUSA models with the A.P.A. Active Purge Assist inflator system, US Divers and XS Scuba
  •  MANUFACTURER'S WARRANTY

And the reviews are in:
"Excellent" - Scuba Lab

UPGRADES:
Ideations Surface & Underwater Air Horn Dive Alert Plus V.2 Type III Add $76.50
Options: 



Scuba Tool Master $19.95

Deluxe Regulator Dive Bag $71.50

Scuba Divers Duffel Bag $39.95

  Retail:
$220.00

You Pay:
$199.95

You Save:
$20.05

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Mfg Part Number :
-

TUSA 创Used-Demo创 Duo-Air

 



  • Nitrox compatible to 40% (The recreational limits of Nitrox)
  • Inflator integrated secondary air source
  • The Duo Air is positioned at the end of the Buoyancy Compensator hose
  • Eliminating hose clutter, because you use the same hose to supply both the power inflator and your alternate air source, also known as safe-2nd or Octo
  • Compatible with all BC's - will NOT fit BC's made by Aeris, Aqua-Lung, Cressi, Dacor, Oceanic, SeaQuest, TUSA models with the A.P.A. Active Purge Assist inflator system, US Divers and XS Scuba
  •  MANUFACTURER'S WARRANTY

And the reviews are in:
"Excellent" - Scuba Lab

UPGRADES:
Ideations Surface & Underwater Air Horn Dive Alert Plus V.2 Type III Add $76.50
Options: 



Scuba Tool Master $19.95

Deluxe Regulator Dive Bag $71.50

Scuba Divers Duffel Bag $39.95

  Retail:
$220.00

You Pay:
$130.00

You Save:
$90.00

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Mfg Part Number :
RG320

XS Scuba Airwave Octo

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XS Scuba Airwave OctoCustomer reviews

 



"Scuba Lab Testers Choice and Best Buy!"
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • "Diver Adjustable" venturi to prevent unwanted free-flow
  • Bright "hi viz" yellow accents for easy identification
  • Rugged, reliable and affordable
  • Exceptional breathing performance
  • Compact, light weight design
  • Orthodontic mouthpiece
  • Comes with a 36" hose
  • FULL MANUFACTURER'S WARRANTY
UPGRADES:
Scuba Deluxe Round Protective Regulator Bag Add $29.95
Options: 



Divers Tool Master $19.95

Scuba Equipment Care & Maintenance Book $19.95

Octo Holder $5.95

  Retail:
$125.00

You Pay:
$109.95

You Save:
$15.05

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Mfg Part Number :
127849

Aqua Lung Mikron Octo

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  • Orthodontic mouthpiece to alleviate jaw fatigue by easing bite needed to hold regulator
  • Exhaust tee designed to keep bubbles out of your vision and reduce effort to exhale
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • "Diver Adjustable" venturi to prevent unwanted free-flow
  • Bright "Hi-Viz" yellow hose and 2nd stage cover for easy identification
  • LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS
UPGRADES:
Scuba Deluxe Round Protective Regulator Bag Add $29.95
Options: 



Scuba Tool Master $19.95

Breakaway Octo Holder $5.95

Deluxe Diver Tool And Repair Kit $34.95

  $215.00

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Mfg Part Number :
320-3110U

Zeagle Envoy Octo.

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Zeagle Envoy Octo.Customer reviews

 



"Scuba Lab Testers Choice!"
UPGRADES:
Scuba Deluxe Round Protective Regulator Bag Add $29.95
Options: 



Divers Tool Master $19.95

Scuba Console Protection Sleeve $9.95

Octo Holder $5.95

  Retail:
$162.00

You Pay:
$139.95

You Save:
$22.05

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Mfg Part Number :
21.089.000

ScubaPro Octo - Air II Balanced - 4th Generation

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"Scuba Lab Testers Choice!"
  • Brand new & completely redesigned 4th generation
    Not like most other sites that sell the old discontinued 3rd, 2nd or even 1st generation
  • Inflator integrated secondary air source
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • Single hose configuration
  • Classic downstream valve
  • Air-balanced power inflator valve
  • Self-flushing mechanism
  • Compatible with all BC's except by Aeris, Aqua-Lung, Cressi, Hollis, Oceanic, SeaQuest, TUSA models with the A.P.A. Active Purge Assist inflator system, US Divers and XS Scuba
  • Does not include corrugated BC hose
  • FULL MANUFACTURER扴 WARRANTY  
UPGRADES:
Ideations Surface & Underwater Air Horn Dive Alert Plus V.2 Type III Add $76.50
Options: 



Deluxe Regulator Dive Bag $71.50

Divers Tool Master $19.95

Deluxe Diver Tool And Repair Kit $34.95

  $219.00

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Mfg Part Number :
128560

Aqua Lung Calypso / Titan Octo

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Aqua Lung Calypso / Titan OctoCustomer reviews

 



  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • "Diver Adjustable" venturi to prevent unwanted free-flow
  • Bright "hi viz" yellow accents for easy identification
  • Rugged, reliable and affordable
  • 39" Hi-Viz neon yellow hose
  • FULL MANUFACTURER’S WARRANTY
UPGRADES:
Innovative Octo Holder.. Add $5.95
Options: 



Divers Tool Master $19.95

Scuba Equipment Care & Maintenance Book $19.95

Deluxe Round Protective Scuba Regulator Bag $29.95

  $170.00

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Mfg Part Number :
416893

Mares Alt Air Control Integrated Octo

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Mares Alt Air Control Integrated OctoCustomer reviews

 



  • Nitrox compatible to 40% (The recreational limits of Nitrox)
  • VAD (Vortex Assisted Design) by-pass system for effortless, natural breathing under all conditions
  • Inflator integrated secondary air source
  • The Alt Air Control Integrated Octo is positioned at the end of the Buoyancy Compensator hose
  • Eliminating hose clutter, because you use the same hose to supply both the power inflator and your alternate air source, also known as safe-2nd or Octo
  • Specially designed mesh grid cover to prevent unwanted free-flow even
    in the strongest currents
  • Light weight and compact design 
  • Convenient, fixed location  
  • Replaces loose, hanging octo  
  • Compatible with all Mares BC's - except with BC's that have the AirTrim Systems
  • FULL MANUFACTURER’S WARRANTY
UPGRADES:
Ideations Surface & Underwater Air Horn Dive Alert Plus V.2 Type II Add $76.50
Options: 



Folding BCD Hanger $11.99

Deluxe Regulator Dive Bag $71.50

Scuba Tool Master $19.95

  Retail:
$240.00

You Pay:
$224.95

You Save:
$15.05

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Mfg Part Number :
02-0360-3P

Atomic Z2 Octo

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Atomic Z2 OctoCustomer reviews

 



UPGRADES:
Atomic Deluxe Regulator Bag Add $71.50
Options: 



Scuba Tool Master $19.95

Breakaway Octo Holder $5.95

Scuba Equipment Care & Maintenance Book $19.95

  $290.00

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Mfg Part Number :
SR9000

Sherwood Gemini Breathable Inflator

Free Standard Shipping

Sherwood Gemini Breathable InflatorCustomer reviews

 



"Scuba Lab Best Buy!"
  • Nitrox compatible to 40% (The recreational limits of Nitrox)
  • Dive with one less hose
  • Inflator integrated secondary air source
  • Bright "hi viz" yellow accents for easy identification
  • Convenient, fixed location
  • The Gemini is positioned at the end of the Buoyancy Compensator hose
  • Eliminating hose clutter, because you use the same hose to supply both the power inflator and your alternate air source, also known as safe-2nd or Octo
  • Compatible with all BC's except by Aeris, Aqua-Lung, Cressi, Dacor, Hollis, Oceanic, SeaQuest, TUSA models with the A.P.A. Active Purge Assist inflator system, US Divers and XS Scuba
  • LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS

UPGRADES:
Ideations Surface & Underwater Air Horn Dive Alert Plus V.2 Type III Add $76.50
Options: 



Divers Tool Master $19.95

Polar Fleece Beanie $10.00

Scuba Divers Duffel Bag $39.95

  Retail:
$210.00

You Pay:
$199.95

You Save:
$10.05

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Mfg Part Number :
AP0756

Apeks Egress Octo

Free Standard Shipping

 



  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • Rugged, reliable and affordable
  • Exceptional breathing performance
  • Streamline flat design
  • Bright "Hi-Viz" yellow hose and 2nd stage cover for easy identification
  • 36" Hi-Viz neon yellow hose
  •  LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS
UPGRADES:
Innovative Octo Holder.. Add $5.95
Options: 



Deluxe Round Protective Scuba Regulator Bag $29.95

Scuba Equipment Care & Maintenance Book $19.95

Scuba Tool Master $19.95

  $185.00

ask an expert



Mfg Part Number :
15230

Aqua Lung Airsource QD Octo

Free Standard Shipping

 



UPGRADES:
Ideations Surface & Underwater Air Horn Dive Alert Plus V.2 Type II Add $76.50
Options: 



Scuba Tool Master $19.95

Legend Regulator Bag $47.00

Deluxe Diver Tool And Repair Kit $34.95

  $235.00

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