Hollis 321 Octopus Regulator


The Hollis 321 octopus Regulator is designed on the same platform as the high performance 221 2nd stage.


1 in stock

SKU: HOLLIS-321 Categories: ,


The Hollis 321 Octopus Regulator is a pneumatically balanced second stage ideally suited to the over-balanced first stage of the Hollis DC7 and DC1.

The Hollis 321 Octopus Regulator is no longer available for purchase. We have 1x left in stock in store so once that has sold that’s it.

The 321 has been replaced by the Hollis 150LX Octopus. Retail price at the time of writing this for the 150LX is $499, so if you were looking for an octopus with Hollis standards of quality and realiability but at a cheaper price point, this is the way to go.

The 321 has an adjustable venturi system. This is a dive/pre dive switch, that provides in the ability to adjust the breathing difficulty throughout the dive. When descending you can alter the breathing to be easier to breathe more air.


  • Patented Orthodontic Mouthpiece with High-Density Bite Tabs
  • Ergonomic A.V.S. (Adjustable Venturi System) Dive/Pre-Dive Switch
  • The Hollis 321 Octopus has a high visibility yellow front cover
  • The Hollis 321 Octopus Regulator- comes standard with a 36in / 91cm yellow hose

Proudly family owned, Mike and Deb have run Jetty Dive Centre since 1996. Our team has developed extensive knowledge in the products we stock, as we’re out diving with them! If you have any questions or would like a personal recommendation, feel free to contact us anytime. We’d be happy to help you out any way we can!

Additional information


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Where to find us.


Jetty Dive Centre Dive Shop is at 398 Harbour Drive, Coffs Harbour, NSW 2450. This is where you begin your experiences with us! All Scuba Dives and Snorkelling must check-in before moving to departure point.


All our boats leave from the Public floating pontoon wharf opposite the “Attitude Burgers “ building.

Jetty dive google maps with markers for priority locations