supply installation and commissioning of 105 nos of roof top solar water heating system capacity 500 ltr , supply and insatllation , supply, installation & commissioning of roof top solar water heating system capacity 500 ltr. including1) supply & fitting of gi water piping size ¾ ” make jindal, ravindera and other reputedbrands including other fittings from overhead tank to solar water heater, solar water heater to final usage point (approx. 40 ft). (2) electrical connection of solar water heater with copper wire size 4mm make havells, rr and other reputed brand including other fittings (approx 30 ft.)(3) ms stand of height at least 6 ft weight 70 kg. for overhead tank of cold water.