Water main primed syphon pump - has suction end of tube closed by floating ball under mains pressure, and syphon starting when mains is shut

摘要

The syphon pump comprises a tube which, at one end, can be connected to the water main via a valve, The other end is open and provided with a seat for a floating ball. An outlet branching off from the tube. The open end is inserted in the vessel to be emptied and the valve opened so that the mains pressure forces the ball on to its seat and the tube fills with water. When it is completely filled, the valve is closed, the ball rises and syphon action starts.