A detailed study has been carried out to bring out the significance of installing solar water pumps in every household of major cities. A case study of Bangalore city is taken. Solar irradiation data is superimposed on the pumping characteristics and it has been found that PV panels ranging from 60 W to 500 W are sufficient in residential buildings of Bangalore city, for filling the overhead tanks on “along the sun” basis. Furthermore, such installations are found to reduce significantly the peak load and bring down the distribution line losses. Government policies and regulations are required to promote the use of PV water pumps in urban domestic sector.