bids are invited for supply of strong acid cation exchange resin , supply of filtration media consist of gravels , supply of twin lobe type rotary air blower , supply of g.i. frontal pipe work for pressure sand filters , supply of g.i. frontal pipe work for water softeners size 65 mm , supply of c.i. butterfly valves for pressure filters size 65 mm , supply of c.i. butterfly valves for pressure filters and mixing of common salt , supply of c.i. diaphragm valves for water softeners size 65 mm , supply of c.i. diaphragm valves for water softeners size 40 mm , supply of c.i. ejector for water softeners size 25 x 40 x 40 mm , supply of g.i. interconnected piping from pumps header to filters , supply of rate of flow meter suitable for flow range of 3-30 cum , supply of on-line flanged type vortex water meter of size 65 mm , supply of pp strainers , supply of rubber gaskets for anholes or hand holes of filters , supply of nuts bolts for manholes or hand holes and piping for filters , supply of chemical dozing systems complete with diaphragm , supply of brine solution tanks suitable for common salt saturation solution , removal of old filter media and cation resin from filters and softeners total quantity : 2498