SIPHON, SELF PRIMING (0606) These siphons are self-priming. Container may be emptied inserting the open end of the tube in the liquid and pumping the bulb with stopcock closed. As soon as the liquid enters the bulb, the flow is automatically regulated. No further pumping is needed and the stopcock may be used to dispense whenever required. Available in pipe diameter 6mm & 12.5mm. Qty :