SomnoFlo® Low-Flow vaporizers accept a maximum compressed gas pressure of 15 psi. If your compressed gas source exceeds 15 psi, a preset pressure reducer is required. The Preset Pressure Reducer can reduce the incoming pressure to the vaporizer from as high as 100 psi down to 15 psi. Includes 12″ tubing and connectors and 10′ high pressure oxygen hose with DISS fitting.