tender for providing and fixing of 5 hp air compress pump (kirloskar make) for rapid sand filter back wash at chair complete in all respect as per the direction of the engineer-in-charge. , providing laying and jointing in trenches galvanised mild steel tube (medium grade) of 50 mm diameters conforming to is-1239 as specified below jointed with butt welding according to relevant bis code 816-1969 including all short pieces bends,tee and other specials etc. made from parent tubes as applicable for the particular reach and of approved specifications as per site conditions including flushing, cleaning and hydraulic testing complete to the best satisfaction of the engineer-in-charge. the laying of pipes should conform to bis code 5822-1970 within all leads and lifts complete in all respect for back wash line at rapid sand filter to pump at chair pumping. , repair of nrv and c.i. sluice valves 200 mm dia 3 nos. each, nut bolts, spindles and gasket i/c welding works complete in all respect as per the direction of the engineer-in-charge at chair pumping station. , repair of c.i. sluice valves 150 mm dia 3 nos. and 300 mm dia 4 nos. complete in all respect as per the direction of the engineer-in-charge for rapid sand filter at dhalli filter. , wiring for circuit/ sub-main with following size pvc insulated heat resistant flame retardant (hrfr) and low smoke single core (flexible) copper conductor cable in surface / recessed steel conduit along with 1 no. hrfrls/pvc insulated single core copper conductor cable of same size for earthing as required. 2x1.5 sq. mm. slow sand filter complete in all respect as per the direction of the engineer-in-charge. , providing anding fixing 20 watt led street light fixture complete all respect with lamp bend and sutaible copper wire etc.of required make and model at slow sand filter dhalli complete in all respect as per the direction of the engineer-in-charge.