Elevated tank is made up of the following components: 1.- cistern .- it is below the ground level that serves for water storage. 2.- support structure.- it is generally made up of beams and columns. 3.- machine house.- which is installed on the cistern where the machine equipment is located 4.- elevated tank.- which for water storage; its level must be above the sshh to guarantee a pressure in the sanitary devices. 5.- mechanical electronic equipment.- consisting of one or more electro pumps; drive pipe; suction pipe. finally formed by other accessories by level sensor; overflows; pipeline. tank functions: 1. provide a reserve of water that minimizes interruptions due to transmission failure; pumping or other equipment. 2. maintain uniform pressure; and act as a valve.