providing, stringing out 90mm o / d pvc pipes isi marked as per isi-4985 casting along the trenches and laying the same in trenches to correct alignment and gradients, cutting, jointing and testing & including excavation by machanical, repair of inlet channel, replanishment of filter media. providing & fixing floating arm 1 no., repair and replacement of control panel, providing & fixing chlorination plant, repair and minor replacement of existing pipe line, providing & fixing c.i / d.i flanged, s. valve, construction of masonary sluice valve chamber, house connections and all other works contigent there too