Hollis 212 DC3

An overbalanced diaphragm allows the Hollis 212 DC3’s intermediate pressure to progressively increase as depth and gas-density increase for consistent gas flow regardless of depth.

The 212 second stage comes with Hollis’ Dynamic Adjustment that automatically maintains inhalation effort throughout the dive, along with a dive/predive switch.

For comfort, the orthodontic mouthpiece has high-density tabs that so you can bite down without overclenching the jaw. This reg scored near-perfect breathing-machine performance and an ergo rating rivaling the most expensive regs.

A sweet breather in all positions and extremely dry, test divers also liked the set-it-and-forget-it function of the Dynamic Adjustment.


  • Weight 2 lb., 11 oz.
  • 1st Stage Overbalanced diaphragm
  • Ports 1HP, 4LP
  • 2nd Stage Pneumatically balanced
  • Adjustments AVS dive/predive switch, Dynamic Adjustment knob

Price: $555


Bottom Line

A solid reg designed for a wide range of conditions, it delivers first-string performance at a reasonable price.

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