1.) When inflating, make sure that the center valve pin is in the “up” position. If it is in the “down” position, please press down on the valve pin and turn it counterclockwise until it pops up.
2.) The inflation nozzle on your SUP may need to be re-seated and tightened. A tool came with your board. Please unscrew and remove the nozzle, then put it back on and tighten it with the plastic tool. Be careful with the threads as they are like a regular screw and should be careful to avoid cross threading. It will screw on easily. See this article for help, and below video:
3.) The inflation nozzle operation works like this:
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