Kite brands use few version of "big" boston valves, I'm talking about the ones with approx 42 - 45mm valve necks. There's difference in valve bases, valve necks and valve screws. They all use a bit different inner valve inflation walls, and also the pump adaptors are not all in the same shape. So, some adapters may fall out the valve easier.
The best adapter fit will be achieved if you rotate the adapter to the right (clockwise) to lock it more securely once inserted into the valve. Also, pump hoses are made from stiff plastic, so it helps if you position it as straight as possible when inflating,so that it does not apply anti clockwise rotation on the adapter.
dave1986 wrote: ↑Mon Oct 21, 2019 2:25 pmI believe that the screw-in valve type shown in the photo below is called a "Boston Valve". It's used on many kites including Ozone and Naish etc...
I'm finding that the wider diameter cylindrical shape pump nozzle doesn't fit very tightly into the valve hole, so when the kite reaches 2 or 3 PSI, the pump nozzle pops out due to not being a tight enough fit. So then I have to pump the remainder using 1 hand to hold the nozzle, and one hand on the pump
Has anyone else experienced this problem, and have a solution?