bids are invited for external pipe line - (a) supply and laying gi tubings medium grade dia isi mark with all fittings such as elbow, bends, sockets, nipples and union etc and fixed complete laid in trench for the 25 mm diaincluding taking down all as specified and directed by engr-in-charge. rm-165(b) excavating in trenches n exe 1.5 m wide and notexceeding 1.5 m in depthgetting out hard/dense soil for laying of gi pipe completecomplete all as directed by engr-in-charge cum 27(c)returning filling in including spreading, levelling, watering and well ramming in layers n.exc 25cm in hard dense soil completge all as specifiedd and directed by engineer-in-charge. cum 24 (d) removing excavated soil to a distance not exc 50 m and depositing where directed at a level not exc 1.5 m above the starting point complete all as specified and directed by engineer-in-charge cum 03(e) s& f 25 mm stop valves, cast copper alloy, screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed complete each 04 total quantity : 1