In water supply networks system, the major problem is water leakage. Unwanted water leakage due to leaky pipe lines and beneath the underground pipelines is almost always pertaining in drinking water supply networks. This system contains two sections, first part is leakage detection and automatically closes the solenoid valve for to prevent the over leakage of water and send SMS to the corporation using GSM module according to sensor information. By using GPS location to detect where the leakage takes place. The second part is that to fill the water tank by using android application.