inglés al español Ciencias Medicina: Farmacia

Which will be the best way to translate this phrase from American English into European Spanish?

Here is the full phrase:

Attach the coupler to the water bottle and turn the drink valve on (lever upwards). Hold the bottle upside down at head height and blow into the mouthpiece to pressurise the bottle assisting flow. Drink as required. Turn the water bottle upright and blow to clear remaining fluid. Turn the drink valve off (lever downwards), remove coupler from the bottle and re-stow in the stowage port at the front of the face mask.

It's a translation of FULL FACE MASK USER INSTRUCTIONS.