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
The XT Regulator welcomes a new generation of regulator performance at Dive Rite. An elite performer, the XT`s advanced, patented design earns top marks from Mike Ward of Dive Lab. With work of breathing at less than 1.0 J/l, the XT performs right alongside premier regulators on the market today.