Wireless water tank management system completely automates the overhead water tank filling process thus eliminating the need to manually operate water pump. Installation is super easy and can be done in minutes. It consists of two parts, one is installed on the water pump and second is at overhead water tank. Both are connected via RF and no external wire is required. It eliminates the water and power wastage caused due to the overflows and also provides with increased level of comfort for not having to operate the pumps manually.