1. Before connecting the valve to the container, turn the knob fully counterclockwise.
2. Turn the knob counterclockwise until it reaches its highest position.
3. Connect the central hose with a valve fitting. Turn the knob fully clockwise.
4. Rotate the knob clockwise to punch a hole in the sealed cap at the top of the bottle.
5. Loosen the center hose nuts connected to the pressure gauge fitting.
6. Release the air for a few seconds and tighten the nut.