maintenance of water supply , sanitary ( plumbing ) work in factory and township and operation of tube wells and oxidation pond at bel kotdwara , item for ist year ( factory work ) , maintenance of all water supply and sanitary ( plumbing ) work in zone 1 as per the scope of work and direction of engineer-in-charge , laying / extension of 15 mm dia to 40 mm dia pipe line connection of gi pipe , including dismantling & repairing of walls , floors , fixing clamps in trenches etc . complete as per the direction of engineer-in-charge . , cleaning of water storage over head tank , capacity 450 kl-675 kl , repairing / replacing of ci gate valves , size 3 to 8 as per scc . , dismantling choked gi pipes 15-25 mm dia from buildings . , operation of tube wells in of bel water supply system in factory at bel kotdwara as per the direction of engineer-in-charge , item for ist year ( factory work ) , maintenance of all water supply and sanitary ( plumbing ) work in zone 2 & 3 as per the scope of work and direction of engineer-in-charge , laying / extension of 15 mm dia to 40 mm dia pipe line connection of gi pipe , including dismantling & repairing of walls , floors , fixing clamps in trenches etc . complete as per the direction of engineer-in-charge . , cleaning of water storage over head tank , capacity 450 kl-675 kl , repairing / replacing of ci gate valves , size 3 to 8 as per scc . , dismantling choked gi pipes 15-25 mm dia from buildings . , operation of tube wells of bel water supply system in township at bel kotdwara as per the direction of engineer-in-charge , operation & maintenance of sewage pumping system as per direction of the engineer-in-charge , item for 2nd year ( factory work ) , maintenance of all water supply and sanitary ( plumbing ) work in zone 1 as per the scope of work and direction of engineer-in-charge , laying / extension of 15 mm dia to 40 mm dia pipe line connection of gi pipe , including dismantling & repairing of walls , floors , fixing clamps in trenches etc . complete as per the direction of engineer-in-charge . , cleaning of water storage over head tank , capacity 450 kl-675 kl , repairing / replacing of ci gate valves , size 3 to 8 as per scc . , dismantling choked gi pipes 15-25 mm dia from buildings . , operation of tube wells in of bel water supply system in factory at bel kotdwara as per the direction of engineer-in-charge , item for 2nd year ( township work ) , maintenance of all water supply and sanitary ( plumbing ) work in zone 2 & 3 as per the scope of work and direction of engineer-in-charge , laying / extension of 15 mm dia to 40 mm dia pipe line connection of gi pipe , including dismantling & repairing of walls , floors , fixing clamps in trenches etc . complete as per the direction of engineer-in-charge . , cleaning of water storage over head tank , capacity 450 kl-675 kl , repairing / replacing of ci gate valves , size 3 to 8 as per scc . , dismantling choked gi pipes 15-25 mm dia from buildings . , operation of tube wells of bel water supply system in township at bel kotdwara as per the direction of engineer-in-charge , operation & maintenance of sewage pumping system as per direction of the engineer-in-charge