tender for addition/ alteration, repair and servicing of iron removal plant of no. 1 mgar (n) at dimapur.; 1 repair to iron removal plant 2 m/l for dismantling of existing 10000 gph irp including removal of existing old filter media of various aizes, unserviceable strainers etc and deposited to place where directed complete 3 cleaning the surface s of irp and all acesses with emery paper, preparing the surfaces and painting with two coats of synthetic enamel paint over a coat of red oxide primer on outer surfaces and two coat of black bituminous paint (food grade) on inner surfaces of irp of capacity 10000 gph as as specified and directed by engr-in-charge. 4 supply and refilling barakar sand of 16/32, 10/20 mm size and gravel of size 1, 3/4 1/2/3/8, 1/4, 1/8 5 supply and filling best quality anthracite and green sand medua 20 bag 6 supply and fixing rubber gasket joints for all packing required places of irp unit including nut bolts 7 replacement of air release pipe and repairing of inter-connected ms pipe line 8 supply and replacement of plastic damaged strainers (push type) of approved quality and size wherever reqd 9 supply and fix water pressure gauge (glycerin filled) duly calibrated of existing size complete 01 job all as specified and dircted