Abstract: A pumping system and a method for pumping liquid from a lower level to an operatively higher level are disclosed. The pumping system includes a pumping device, a bent delivery conduit, a single control port opening and control elements. The conduit has an operatively inclined ascending conduit section; an operatively inclined descending conduit section and an operatively horizontal peak section between the inclined sections; one end of the ascending conduit fitted to the outlet of the pumping device and one end of the descending conduit being below liquid level of the higher level. The single port opening is provided at the junction between the horizontal peak section and the descending conduit section, and spaced apart from the ascending conduit junction. The control elements introduce pressurized air into and evacuate air from the delivery conduit through the single port opening.

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