Supply, delivery and laying of filter sand media, grit and pebbles including removing of old media grit ac pipes, plastering to internal walls, epoxy painting to the internal surfaces of the filter beds, relaying of new sand media, grit and pebbles with replacement of damaged top/bottom and side ms channels with new ms channels, replacement of lateral ac/cpvc etc., for filter beds nos 1,2,3,4,5 and 9 plastering and water proofing to roof top of wtp building at phase-i, wtp rajampet under sub-division no.i, kalabgoor, transmission division no.ii, patancheru