The Gas Switch Block by OmniSwivel International offers a diver the ability to change between two separate gas supplies without having to remove a full face mask. To make the switch, the knob turns a full 180-degrees, ensuring that there is no accidental switching during the dive. When the knob is centered it is in the shut-off position. In case of a second stage failure, a diver can turn the flow to the mask off and switch to an alternate regulator. The shut-off position also prevents a cross blending of gases during a switch over.

V2 updated in July 2022, now one Gas Switch Block can be converted from right to left. It has two 9/16-inch male inlets and one 3/8-inch female outlet. The block is constructed of solid brass for maximum durability, and uses oxygen compatible materials and o-rings. The 9/16-male inlet adapters can be removed to expose 3/8-inch female ports, allowing for hose attachment flexibility. Quick disconnects can be attached directly to the inlet ports, alleviating the need for more adapters.

Dive Gear Express supplies Omniswivel products for use in recreational sport and technical diving applications. While we are aware many of their products also have use in commercial, public safety, and military diving applications, we are not qualified to advise regarding their use in other than recreational diving. For use with other applications we suggest you contact the manufacturers of the equipment you wish to use these components with for appropriate advice on their application.