air-valve, valve, electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, tube, vacuum tube {zn.} valve [v] (la ~)
purge [v] (la ~)
ventouse [v] (la ~)
reniflard
Try to check the flow of water by turning the valve.
Essaie d'arrêter le courant d'eau en tournant la valve.