A recent repair completed on a 90,000 litre water tank with active flow. The tank is the only water supply for the household and had several attempts of repairs by other contractors, using all type of wonderful materials including timber wedges smashed directly into the crack. C.R.G applied a negative side Xypex full crack repair system leaving the tank leak free on the same day. The tank did not have to be drained or inlets/outlets isolated. The occupants were not without water at the time the repair. At the time of the repair there was a heavy rain and the water level increased by 900mm leaving the asset owner very happy as he had not seen that much water held in years.