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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´s Spare Air


360 product view
Mfg Part Number :
300PKYEL

Submersible Systems Spare Air Pack

Eligible for Free Standard Shipping on orders over $25

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

Options: 



Mini Pressure Gauge For Spare Air $49.95

Spare Air Travel Pack $17.95

Divers Tool Master $19.95

  Retail:
$299.00

You Pay:
$249.95

You Save:
$49.05



Mfg Part Number :
14-0001-3P

Atomic SS1 Scuba Octo

Atomic SS1 Scuba 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 $121.00
Atomic Angled Hose Adapter for Seaquest BCs Add $11.95

Options: 



Scuba Tool Master $19.95

Atomic Deluxe Regulator Bag $65.00

Deluxe Diver Tool And Repair Kit $34.95

  $249.00


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


360 product view
Mfg Part Number :
40.4242.53

Oceanic Slimline 2 Scuba Octo

Eligible for Free Standard Shipping on orders over $25

Oceanic Slimline 2 Scuba 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:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Divers Tool Master $19.95

Deluxe Large Protective Scuba Regulator Bag $19.95

Ergonomic Supersoft Silicone Mouthpiece $9.95

  Retail:
$145.95

You Pay:
$139.95

You Save:
$6.00



Mfg Part Number :
02-0360-3P

Atomic Z2 Scuba Octo



UPGRADES:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Scuba Tool Master $19.95

Atomic Deluxe Regulator Bag $65.00

Scuba Equipment Care & Maintenance Book $19.95

  $290.00


Demonstration Video:
Video: Hollis 321 Octo Video Review

Mfg Part Number :
240.3624.M

Hollis 321 Balanced Scuba Octo

Hollis 321 Balanced Scuba 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
  • Pneumatically balanced second stage 
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • Orthodontic mouthpiece 
  • "Diver Adjustable" venturi to prevent unwanted free-flow
  • Lightweight 2nd stage to prevent jaw fatigue and add to overall comfort
  • Bright "Hi-Viz" yellow hose and 2nd stage cover for easy identification
  • 36" Hi-Viz neon yellow hose
  • FULL MANUFACTURER’S WARRANTY
UPGRADES:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Deluxe XLarge Dive The World Embroidered Towel $24.95

Deluxe Large Protective Scuba Regulator Bag $19.95

Polar Fleece Beanie $12.95

  $178.95




360 product view
Mfg Part Number :
RG330

XS Scuba Airwave Plus Inline Scuba Octo

Eligible for Free Standard Shipping on orders over $25

XS Scuba Airwave Plus Inline Scuba 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
Yellow



Scuba Equipment Care & Maintenance Book $19.95

Polar Fleece Beanie $12.95

Divers Tool Master $19.95

  Retail:
$180.00

You Pay:
$159.95

You Save:
$20.05



Mfg Part Number :
SR7206

Sherwood Dual Scuba Octo

Eligible for Free Standard Shipping on orders over $25

Sherwood Dual Scuba OctoCustomer reviews

Yellow



Divers Tool Master $19.95

Deluxe Large Protective Scuba Regulator Bag $19.95

Polar Fleece Beanie $12.95

  Retail:
$117.00

You Pay:
$99.95

You Save:
$17.05



Mfg Part Number :
11.360.200

ScubaPro C200 Scuba Octo

Eligible for Free Standard Shipping on orders over $25



  • 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 Regulator Dive Bag Add $40.00

Options: 



Scuba Tool Master $19.95

Breakaway Octo Holder $7.95

Deluxe Diver Tool And Repair Kit $34.95

  $219.00



Mfg Part Number :
RG320

XS Scuba Airwave Scuba Octo

Eligible for Free Standard Shipping on orders over $25

XS Scuba Airwave Scuba 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
  • FULL MANUFACTURER'S WARRANTY
UPGRADES:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Divers Tool Master $19.95

Scuba Equipment Care & Maintenance Book $19.95

Deluxe Large Protective Scuba Regulator Bag $19.95

  Retail:
$125.00

You Pay:
$109.95

You Save:
$15.05




360 product view
Mfg Part Number :
08.7020

Oceanic Air XS II

Eligible for Free Standard Shipping on orders over $25

Oceanic Air XS IICustomer reviews

  • Low Pressure inflator hose included
  • Nitrox compatible to 40% (The recreational limits of Nitrox)
  • Replaces loose, hanging octo
  • Dive with one less hose
  • Convenient, fixed location
  • Inflator integrated secondary air source
  • 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 Aeris, Oceanic and XS Scuba BC's and all other 3/4 inch corrugated hose style BC's
  • Corrugated hose not included -See upgrades to order, Complete Units only compatible with Aeris and Oceanic BCD's 
  • LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS

UPGRADES:
Complete with 16´´ Corrugated BC Hose Add $10.00
Complete with 18´´ Corrugated BC Hose Add $10.00

Options: 



Scuba Equipment Care & Maintenance Book $19.95

Divers Tool Master $19.95

XS Scuba Deluxe Mesh Backpack Dive Bag $74.95

  Retail:
$179.95

You Pay:
$169.95

You Save:
$10.00



Mfg Part Number :
100PK

Submersible Systems 1 Cubic Foot Air Xtreme



 

UPGRADES:
Submersible Systems Spare Air Yoke Refill Adapter Add $44.95

Options: 



Spare Air Safety Leash $11.95

Spare Air Travel Pack $17.95

XL Microfiber Towel $29.95

  $249.95



Mfg Part Number :
GS065

Genesis Sidekick Scuba Octo

Eligible for Free Standard Shipping on orders over $25

Genesis Sidekick Scuba OctoCustomer reviews

Yellow



Polar Fleece Beanie $12.95

Divers Tool Master $19.95

Deluxe Large Protective Scuba Regulator Bag $19.95

  Retail:
$179.95

You Pay:
$106.95

You Save:
$73.00



Mfg Part Number :
02-0005-3P

Atomic Ti2 Titanium Scuba Octo



UPGRADES:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Divers Tool Master $19.95

Atomic Deluxe Regulator Bag $65.00

Scuba Equipment Care & Maintenance Book $19.95

  $350.00



Mfg Part Number :
750-6206

Zeagle Pony Bottle System

Eligible for Free Standard Shipping on orders over $25

Zeagle Pony Bottle SystemCustomer reviews

UPGRADES:
Scuba Tank Carrier Add $12.95

Options: 



Polar Fleece Beanie $12.95

Deluxe Diver Tool And Repair Kit $34.95

Zip On Pony Bottle Mount $24.95

  Retail:
$449.00

You Pay:
$403.95

You Save:
$45.05



Mfg Part Number :
SR9000

Sherwood Gemini Breathable Inflator

Eligible for Free Standard Shipping on orders over $25

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:
Scuba Deluxe Round Protective Scuba Regulator Bag Add $29.95

Options: 



Divers Tool Master $19.95

Polar Fleece Beanie $12.95

XS Scuba Deluxe Mesh Backpack Dive Bag $74.95

  Retail:
$210.00

You Pay:
$189.95

You Save:
$20.05



Mfg Part Number :
40.9100

Aeris Air Link

Eligible for Free Standard Shipping on orders over $25

Aeris Air LinkCustomer reviews

"Scuba Lab Best Buy!"
  • Includes low pressure inflator hose 
  • Nitrox compatible to 40% (The recreational limits of Nitrox)
  • Replaces loose, hanging octo
  • Dive with one less hose
  • Convenient, fixed location
  • Inflator integrated secondary air source
  • 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 Aeris, Oceanic and XS Scuba BC's and all other 3/4 inch corrugated hose style BC's
  • LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS
UPGRADES:
Complete with 16´´ Corrugated Hose Add $50.00

Options: 



Divers Tool Master $19.95

Scuba Equipment Care & Maintenance Book $19.95

XS Scuba Deluxe Mesh Backpack Dive Bag $74.95

  Retail:
$159.95

You Pay:
$149.95

You Save:
$10.00



Mfg Part Number :
RAS4

H2O Redundant Scuba Air System 4



  • Free Tank mount bag included
  • Station Filler included
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox) 
  • RG3V balanced diaphragm environmentally sealed 1st stage
  • Durable lightweight 2nd stage
  • Diver Air "On" and "Off" Switch
  • Bright "Hi-Viz" neon yellow cover
  • Available with 13 cubic foot or 19 cubic foot 3000 psi aluminum cylinder  
  • FULL MANUFACTURER'S WARRANTY

 

UPGRADES:
Scuba Tank Carrier Add $12.95

Options: 



Spare Air Pack $249.95

Tank Holder $29.95

Pony Bottle Bracket $52.95

  $439.95



Mfg Part Number :
EAS2S

H2O Extra Air Source Pony Bottle Regulator-2nd Generation



Every Extra Air Source we sell comes complete with:
  • Completely new & redesigned 2nd Generation!
    - not like most other sites that sell the discontinued old 1st Generation model
  • Station filler assembly included
  • On/Off valve allows for worry free storage
  • Extra low pressure and high pressure ports
  • 2nd stage has dual silicone exhaust valves which directs bubbles away from mask
  • Diver Air "On" and "Off" Switch
  • High grade silicone mouthpiece
  • 1st stage has vertical and horizontal swivel
  • Tank not included as pictured- (See below to order)
  • FULL MANUFACTURER'S WARRANTY

For the complete Scuba Lab review - Click Here!

UPGRADES:
Sherwood 6 Cubic Foot Aluminum Scuba Tank Add $85.00
Sherwood 13 Cubic Foot Aluminum Scuba Tank Add $95.00
Sherwood 19 Cubic Foot Aluminum Scuba Tank Add $105.00
Sherwood 30 Cubic Foot Aluminum Scuba Tank Add $115.00

Options: 



Divers Tool Master $19.95

19 Cubic Foot RAS Pony BottleTank Bag $12.95

Pony Bottle Pressure Gauge $59.95

  Retail:
$282.95

You Pay:
$269.25

You Save:
$13.70



Mfg Part Number :
21.089.000

ScubaPro Air II Balanced Scuba Octo - 4th Generation

Eligible for Free Standard Shipping on orders over $25



"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’S WARRANTY  
UPGRADES:
ScubaPro Regulator Dive Bag Add $40.00

Options: 



Polar Fleece Beanie $12.95

Divers Tool Master $19.95

Deluxe Diver Tool And Repair Kit $34.95

  $219.00



Mfg Part Number :
SR4002

Sherwood SR1 Scuba Octo

Eligible for Free Standard Shipping on orders over $25



  • Sherwood's New "Top of the Line" Octo
  • Nitrox Compatible to 40% (The Recreational Limits of Nitrox)
  • Bright "Hi-Viz" yellow hose and for easy identification
  • Designed for extreme depths and cold water
  • "Diver Adjustable" Air flow
  • Lightweight 2nd stage to prevent jaw fatigue and add to overall comfort
  • LIFETIME MANUFACTURER'S PARTS WARRANTY
    NEVER PAY FOR PARTS

And the reviews are in:
"The SR1 Octo is the perfect backup breather" -Scuba Lab

UPGRADES:
Sherwood SR1 Scuba Regulator Bag Add $44.95

Options: 



Scuba Equipment Care & Maintenance Book $19.95

Breakaway Octo Holder $7.95

Divers Tool Master $19.95

  Retail:
$235.00

You Pay:
$199.95

You Save:
$35.05



Mfg Part Number :
320-3110U

Zeagle Envoy Scuba Octo.

Eligible for Free Standard Shipping on orders over $25

Zeagle Envoy Scuba Octo.Customer reviews

"Scuba Lab Testers Choice!"
Yellow



Divers Tool Master $19.95

Deluxe Large Protective Scuba Regulator Bag $19.95

Polar Fleece Beanie $12.95

  Retail:
$162.00

You Pay:
$145.95

You Save:
$16.05



Mfg Part Number :
SR9902

Sherwood Brut Scuba Octo

Eligible for Free Standard Shipping on orders over $25



      
  • 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:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Divers Tool Master $19.95

Deluxe Large Protective Scuba Regulator Bag $19.95

Breakaway Octo Holder $7.95

  Retail:
$147.00

You Pay:
$124.95

You Save:
$22.05



Mfg Part Number :
2981

Poseidon Cyklon Scuba Octo



  • Cyclon Octopus has the exact same performance as the main second stage ensuring it can be used in the most extreme situations
  • The only only octo built to handle the high intermediate pressures at which this regulator delivers optimum performance and ease of breathing
  • FULL MANUFACTURER'S WARRANTY

UPGRADES:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Deluxe Large Protective Scuba Regulator Bag $19.95

Polar Fleece Beanie $12.95

Divers Tool Master $19.95

  $330.00



Mfg Part Number :
416504

Mares Abyss Scuba Octo

Eligible for Free Standard Shipping on orders over $25

Mares Abyss Scuba 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
Yellow



Polar Fleece Beanie $12.95

Deluxe XLarge Dive The World Embroidered Towel $24.95

Scuba Tool Master $19.95

  Retail:
$260.00

You Pay:
$238.95

You Save:
$21.05



Mfg Part Number :
02-0215-3P

Atomic ST1 Scuba Octo

Atomic ST1 Scuba OctoCustomer reviews

UPGRADES:
Scuba Breakaway Scuba Octo Holder Add $7.95

Options: 



Scuba Tool Master $19.95

Atomic Deluxe Regulator Bag $65.00

Deluxe Diver Tool And Repair Kit $34.95

  $430.00


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