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You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing

Aqua Lung Legend Supreme Regulator - Yoke


    Aqua Lung's premier and iconic line of Legend regulators feature an overbalanced diaphragm designed to provide excellent breathing performance. The Legend range features premium engineering, with such features as Aqua Lungs, unique Auto-Closure Device (ACD). 

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    The Legend Supreme shares the same features and performance as the Legend LUX and Legend LX with one notable exception. Instead of the MBS dual control valve, the Legend offers a venturi switch.

    Auto Closure Device (ACD) - keeps corrosive water out of the first stage inlet by automatically closing as the Legend is removed from the cylinder valve
    Unique over-balanced, diaphragm design results in superior performance at depth
    An environmental dry system keeps water out of the main spring chamber thus preventing ice buildup and keeping silt and contamination out
    Unique over-balanced, diaphragm design results in superior performance at depth
    2 HP ports and 4 MP ports are angled for optimum hose routing
    Compatible with up to 40% O2 right out of the box
    Pneumatically-balanced second stage results in smooth, easy breathing
    A venturi switch helps prevent freeflow at the surface and when the regulator is out of the diver mouth
    The Comfo-Bite mouthpiece virtually eliminates jaw-fatigue
    Heat exchanger (patented) which surrounds the valve mechanism,
    Dissipates the cold caused by gas expansion while drawing in the warmth of the ambient water

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