a/mtc of water supply scheme dhire majra block derabassi repair of leakages of sizes 3/4/6 pvc/ac/ci/gi pipes including excavation, cutting, jointing, bailing out water, p/f of d-joints, pipes etc and scouring of pipeline and all other works contingent thereto , as per csr repair of sluice valves along with ss spindle, gm guide nut, gm neck ring, cost with material dismantling, dewatering and repair at site complete job as per ns rate, a) 80mm i/d b) 100mm i/d c) 150mm i/d