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 Right hand side filter beds from 18 to 20 and left hand side filter beds from 21 to 27 in filter annexure building in 410 MLD WTP of Ph-III at Kodandapur under SD.No.I, O & M Div.No.XI, Sahebnagar.