tender for annual operation & maintenance of distribution system and rising main, pipeline, functional house hold tap connection (ac/ci/di/upvc/hdpe) of 1) shaktipur zone-i 2) shaktipur zone-ii 3) bachra zone-i 4) bachra zone-ii 5) rajinagar 6) loknathpur zone-1 7) loknathpur zone-1i 8) mahula and operation & maintenance of iron-elimination plant (iep) for 1)rejinagar 2) bachra zone-ii water supply scheme berhampore sub-division under murshidabad division, phe dte. for 1(one) year.[ valve operation , repairing of bursting / leakage of lds and rising main , maintenance of valves , cleaning of ohr , carrying chlorine from dept. store to the work site , repairing of functional house hold tap connection , cleaning of ferrules , periodical washing of lds , monthly testing of water etc]