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Regular: $149.95

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About TUSA Duo-Air Alternate Combo Inflator

When you took dive lessons you learned to perform specific skills to make you safe and comfortable underwater and at the surface. One of those skills was Buoyancy Control. Once you start diving for fun you use your Buoyancy Control Devise constantly throughout the dive. Your Octopus or Alternate Air Source. evise on the other hand is never used unless there is an Emergency Out of Air Situation. Reacting properly in an Out of Air Situation can make the difference between a Safe Dive and a Tragedy. If your Alternate Air Source and your BCD Inflator Devise are one and the same you will always know where to find it in an emergency.

The TUSA Duo-Air Alternate Combo Inflator is a Second Stage Regulator and Balanced Inflator in a Single, Compact Housing. The Duo is Lightweight, Streamline, and eliminates the need for a Backup-Regulator. The Duo's Air-Balanced Power Inflator Valve means you'll have a steady stream of air, regardless of the pressure in your tank. The Duo leaves you Breathing- Easy throughout your Dives. The Duo has a fixed Venturi Initiated Vacuum Assist Flow Vane for Safe and Uncomplicated use.

The Duo provides One-Hand Operation for Instinctive and Simple Operation the Self-Flushing Mechanism requires just one Push-on-the-Purge to Clear away all Dirt or to Purge Water. The Regulator Mechanism is a Simple, yet Reliable Classic Downstream Demand Valve. Duo is equipped with an Ergonomic Mouthpiece, Soft Second-Stage Cover and One-Button Purge Function. The Regulator's Pre-Tuned System is housed in a Precision Molded Fiberglass Reinforced Nylon Case for Strength and Durability. The Demand Valve is Chrome Plated Brass with a Stainless Steel Spring and a Silicone Rubber Diaphragm and Exhaust Valve. The Duo weighs 6.7 oz (190 g) without the Hose, comes with a 3/8" Threaded 27.56" (70 cm) High-Flow Low-Pressure Hose, Owner's Manual and is covered by a Limited Lifetime Warranty.

Warranty Information

This product has a limited lifetime warranty.


TUSA Duo-Air Alternate Combo Inflator Features

  • Increased Safety in Out-of-Air Emergencies
  • Second Stage Regulator and Balanced Inflator in a Single, Compact Housing
  • Lightweight, Streamline, Eliminates Backup-Regulator (Octopus)
  • Balanced Power Inflator Valve
  • Simple, Yet Reliable Classic Downstream Demand Valve
  • Fixed Venturi Initiated Vacuum Assist Flow Vane, Safe and Uncomplicated Use
  • One-Hand Operation for Instinctive and Simple Operation
  • Self-Flushing Mechanism
  • One-Button Purge Function
  • Single Hose Configuration
  • Ergonomic Silicone Rubber Mouthpiece
  • One Push-on-the-Purge to Clear away all Dirt or to Purge Water
  • Soft Second-Stage Cover
  • Pre-Tuned System
  • Precision Molded Fiberglass Reinforced Nylon Case
  • Strong and Durable Design
  • Demand Valve: Chrome Plated Brass with Stainless Steel Spring
  • Silicone Rubber Diaphragm and Exhaust Valve
  • 3/8" Threaded 27.56" (70 cm) High-Flow Low-Pressure Hose
  • Weight: 6.7 oz (190 g)
  • Owner's Manual
  • Limited Lifetime Warranty

TUSA Duo-Air Alternate Combo Inflator Customer Reviews Powered by TurnTo®

Review Summary


(based on 29 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Most Liked Positive Review


Good Alternate Regulator backup

Have had the Tusa Duo Air for almost a year and about 75 dives. Very pleased with it. Easy to distinguish buttons - I especially like this design when compared with some of the other button configurations out there, good breather. I recommend practicing with it to become familiar and comfortable accessing it and actually breathing with it if the need should arise. Jaw fatigue could be an issue for longer term use by its very nature, but being an alternate this really is a non issue. The D...

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Most Liked Negative Review


Decent secondary-air inflator

For the price this is a good 2nd stage air. The regulator is not very comfortable or ergonomic to use, however it is an emergency device and you will hopefully never have to breath on it for extended periods of time. It is slightly on the heavy side, but you hardly notice when your busy diving. Overall I would recommend this for a diver on a budget.

Reviewed by 29 customers

Displaying reviews 1-5

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Great Buy


from Tallahassee, FL, US

So this is my first regulator that's built into my inflator hose and I have to say that this was a great purchase. I love having one less hose for sure. Super easy to install as well. Thankfully I haven't needed it on a dive, but I have tried breathing on it and it breaths pretty well. The inflator buttons are easy to use even with gloves on. I definitely still prefer my primary regulator but it would do the job with ease in an emergency. An excellent buy for the price for sure! I've seen a lot of other models out there and can't imagine they would breath that much better. I would buy this again, in fact I will be buying one for my wife.




from Bellingham, WA, US

Good backup octo- hose could be a bit longer from 1st stage to octo.


Good for the money


from Vancouver, WA, US

Buttons are a little hard to push, but all in all it works as described.


Good safe second


from Dunedin, FL, US

Easy to install. No complaints about the product. Used 2x since ordering. Buttons are easily located. Good for removing that octo hose from your rig. Perfect size.


Well built product


from Annapolis, MD, US

Just finished 4 days of diving with this product, which I purchased in lieu of an octopus for my regulator. I am a value shopper looking for the best quality for the price and this hits that mark perfectly. As a second stage, it breathes very easily and just as well at 90 feet as it did at 20. It's solidly made by a company that makes/markets regulators and my local shop can service it. Super value!

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Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Why Did You Choose This?
Frank M  sent back not what I expected.
MIKHAIL K  Excellent item. Very satisfied. Highly recommended.
ROBERT W  cut down on weight for dive trip
Shopper  will this work on a hollis hd200 bcd?
J M  Works on non-Tusa BCDs (e.g. my Scubapro).
Harlan B  What BCDs work with this Inflator?
KEVIN F  It works with most BCs.
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