Supply, delivery and laying of filter media of all grades including removing of the old media, repairs and overhauling of lateral AC/PVC perforated pipes, epoxy painting to the internal surfaces of the filter beds and re laying of new and old filter media after mixing of different grades in the Twin Rapid Gravity filter beds of filter bed.nos from 28 to 40 of left hand side of the filter annexure building in 410 MLD WTP of Ph-III at Kodandapur under SD.No.I, O & M Div.No.XI, Sahebnagar.