tender for annual repair and maintenance of 275 kld stp and cleaning and desilting of chocked sewer line and manhole at 52nd bn itb police; cleaning of chocked sewer line by diesel running vehicle mounting hydraulic operated high pressure suction cum jetting sewer cleaning machine fitted with pump having 4000 litres suction capacityand 6000 litres water jetting tank capacity including skilled operator and partial desilting of manholes and dechocking of sewer lines. dechocking and flushing of sewer line from one manhole to another by high pressure jetting system of 2200 psi for sewer line from 150mm dia upto 300mm.