Patent ID: 8740576

Claim:
A pumping system for pumping liquid from a lower level to an operatively higher level; said pumping system comprising: (i) a pumping device fitted at the lower level; (ii) a bent delivery conduit; said bent delivery conduit having an operatively inclined ascending conduit section; an operatively inclined descending conduit section and an operatively horizontal peak section between said inclined sections; one end of said ascending conduit fitted to an outlet of said pumping device and one end of said descending conduit being below a liquid level of said higher level; a junction being defined between said horizontal peak section and said descending conduit section; (iii) a single port opening provided at the junction between said horizontal peak section and said descending conduit section, and spaced apart from said ascending conduit section; and (iv) control means adapted to introduce pressurized air into and evacuate air from said delivery conduit through said single port opening.