A floor cleaning apparatus comprising a cleaning head portion for engaging a floor surface during cleaning, an upstanding portion for maneuvering movement of said cleaning head portion, a liquid delivery assembly comprising a pump (B'), means (C') for diverging a liquid to a first conduit and to a second conduit and valve means (F'), a handle portion extending from said upstanding portion and a sealed liquid storage container, wherein said cleaning head portion includes a first nozzle and a second nozzle arranged on lateral opposite ends for forward discharging of cleaning detergent therefrom, the floor cleaning apparatus is characterized in that the pump (B'), the means (C') for diverging a liquid and the valve means (F') are integrally formed and in that said liquid delivery assembly includes: - a first chamber, - a first pipeline allowing fluid communication between said sealed liquid storage container and said first chamber, - a second chamber situated adjacent said first chamber, - the first conduit allowing liquid to exit from said second chamber to said first nozzle for discharge, - a third chamber situated adjacent said first chamber, - a second pipeline allowing gaseous communication between said third chamber and said sealed liquid storage container, - an inlet allowing surrounding air or gas to enter said third chamber and then said liquid storage container, - a fourth chamber situated adjacent said first chamber, - the second conduit allowing liquid to exit from said fourth chamber to said second nozzle for discharge, and - one motor effecting fluid flow and air flow through the chambers (150,152,154,160) in the liquid delivery assembly, wherein: a. said first chamber is provided with a first aperture for fluid communication with said second chamber, said first aperture is reciprocatingly closable by a first one-way valve, b. said first chamber is provided with a second aperture for fluid communication with said fourth chamber, wherein said second aperture is reciprocatingly closable by a second one-way valve, and c. said second chamber and said fourth chamber are provided with a third one-way valve and a fourth one-way valve, respectively, for separately controlling flow of liquid to said first conduit and said second conduit, respectively. - a first chamber, - a first pipeline allowing fluid communication between said sealed liquid storage container and said first chamber, - a second chamber situated adjacent said first chamber, - the first conduit allowing liquid to exit from said second chamber to said first nozzle for discharge, - a third chamber situated adjacent said first chamber, - a second pipeline allowing gaseous communication between said third chamber and said sealed liquid storage container, - an inlet allowing surrounding air or gas to enter said third chamber and then said liquid storage container, - a fourth chamber situated adjacent said first chamber, - the second conduit allowing liquid to exit from said fourth chamber to said second nozzle for discharge, and - one motor effecting fluid flow and air flow through the chambers (150,152,154,160) in the liquid delivery assembly, a. said first chamber is provided with a first aperture for fluid communication with said second chamber, said first aperture is reciprocatingly closable by a first one-way valve, b. said first chamber is provided with a second aperture for fluid communication with said fourth chamber, wherein said second aperture is reciprocatingly closable by a second one-way valve, and c. said second chamber and said fourth chamber are provided with a third one-way valve and a fourth one-way valve, respectively, for separately controlling flow of liquid to said first conduit and said second conduit, respectively.