Close the valve so the center pin is up, bayonet the adapter a quarter turn with the O-ring seated, then pump high volume first and switch to high pressure until the board feels firm around 12 to 15 PSI for a 10'6 board. To disconnect with minimal loss, keep the pin up, twist off in one smooth move, cap fast, and if you hear more than a short hiss reseat the adapter and check the O-ring.
