tender for annual operation & maintenance of distribution system and rising main pipeline & functional house hold tap connection (ci/di/upvc) of harua , raturi zone-i, raturi zone-ii, ghora pakhiagangin zone-i, kadoa water supply scheme of jangipur sub-division under murshidabad division, p.h. engineering 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]