It Does Not Matter .. When the pressure in the hose is Higher than the pressure in the Tube it will Open The (unstuck) check valve in the Stem.
S/V Auto valves have a spring in the valve core .. .. Kangaroos and Emus
I suggest Buying a Presta Valve Track Pump. Lezyne is nice quality
Last edited by fietsbob; 03-09-15 at 03:28 PM.