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A standard over pressurization valve allows excess gas to vent during ascent and/or to depressurize the bag at the surface
Course prerequisites:
Internal second stage valve: Balanced downstream
SDI Junior Open Water Scuba Diver
the over-balancing feature allows the medium pressure gas in the hose to increase at a rate faster than ambient
Hollis - ST35 Wing PURCHASING OPTIONS:ST35 Wing A standard over pressurization valveHollis ST35 Wing The ST35 is an excellent go anywhere wing with the added lift for local cold water dives but the streamlined design for dive travel. Tank slots and tank cradle are included, allowing you to connect your wing and backplate without the need for a single tank adapter plate. This reduces weight and unnecessary accessories while traveling. The two piece bladder is a tough 1680 Cordura nylon outer shell that prevents abrasion and punctures,
