Supply and delivery of 500mm dia PN 25/class 150 rated, Non-return valves and 500mm dia PN-16 rated, Butterfly valves in place damaged valves and laying of 300mm x 50mmx2mm thick GI ladder type cable tray for 300Sq.mm HT cable for spare feeder from substation to Phase-III, Pump house at Peddapur Phase-III and IV Pumping stations along with accessories etc, under Manjira Drinking Water Supply Scheme, Phase-III and IV under Transmission Division No.II, Patancheru