1/ stand on flat and solid ground
2/ screw the hose onto the pump
3/ connect the hose to the SUP (valve raised)
4/ close the cap of the pump body, its double action operation delivers 3.6 L with each up and down stroke
5/ inflate the SUP until it reaches its full volume
6/ as soon as pumping becomes difficult, open the cap, the pump then operates in single action (1.8 L with each down stroke)
7/ inflate to the SUP's recommended pressure.