maintenance of pipe line network - 1 ns item 2 ns item -ns item -ns item comprehensive maintenance and repair of existing pipelines of all types (di/c/ac/pvc) and all sizes at various depths, including sluice valves, non-return valves, leakages and repair of illegal/not functional water supply connections work includes excavation on any surface, balling out, refilling material and labour cost, machine/equipment hire, repair of sluice valve and replacement of sluice valves components of all sizes (m.5. spindle, gm, chuck nut, chimta, nut bolts, rubber jain, plain dorl, grease, etc.), includes opening/fitting, charage to/from workshop, and all repair related works as per engineer-in-charge`s direction, complete in all respects