F8 Octopus

High performance with free-flow control

Lightweight high-performance second stage with a free-flow control.  Also includes a heat sink and has and adjustable cracking pressure.

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  • New inhalation diaphragm provides superior tear strength and improved response time to breathing (super soft silicone molded over a low friction disk).
  • Improved exhaust valve ensures dryness and a lower exhalation effort.
  • Seat-saving orifice, compliments of Atomic Aquatics, retracts when not in use - extending the life of the breathing tube seat. (#5,803,073)
  • Seat comprised of soft silicone molded over a metal insert to deliver the firmness required for an airtight seal while maintaining the necessary elasticity to prevent leaking.
  • Redesigned front cover and inhalation effort control knob use co-molded components that provide the necessary grip, soft touch and ease of use. Available in several color kits
  • Zirconium-plated inlet tube and heat sink for superior corrosion resistance.
  • Redesigned heat sink dramatically increases surface area, aiding in the heat exchange necessary to avoid freeze-up.
  • Co-molded silicone mouthpiece for better fit and less jaw fatigue

Second Stage Materials:




Nylon 12 

Poppet Seat:

316 SS insert with silicone overmold




Elastomeric Polymer 

Exhaust Valve: