The Apeks Reversible Venturi System (RVS) allows the diver to control the venturi assist with greater precision due to indexable Venturi Lever*. Gas flow to the diver can be directed towards the mouthpiece by indexing the venturi lever towards the plus position. This allows the diver an assisted breathe resulting in a more comfortable dive with less breathing effort. Due to its unique design the venturi lever can be moved to either the left or the right side of the regulator, depending on the desired hose configuration.
With the venturi lever in the minus position, the air-flow from the 2nd stage is directed onto the diaphragm, closing the valve and preventing freeflow.