Tusa’s newest reg aced our tests on the breathing simulator, earning excellent scores for work of breathing from rec limits down to our most demanding test depths and breathing rates. It also performed well in real-world diving, with test divers giving the RS-812 very good scores for ease of breathing in all positions, and finding it to be a dry breather. It’s a comfortable reg too, with a lightweight second stage and a good swivel hose connection. Divers found the breathing adjustment to be easy to operate and very effective; it required a bit of care in adjustment near the open limit to prevent a free-flow. While the purge did its job well, some divers found it to be a bit stiffer than they liked — especially those with smaller hands. Testers called this a solid reg, a description that aptly fit its performance on the simulator and in the water.

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