Electrovalve 1" 24V, which is connected with the Station Controller and receives automatic command to be opend or closed, depending on the irrigation program you have choosen in advance. After the opening the electrovalve allows the water to flow until the rotor (sprayer) and the irrigation begins. For one line it is needed one electrovalve. The line can have some rotors (sprayers), depanding in your needs and the surface needed to be irrigated. Megatek offers gratis service and assistance for technical sketch and list of materials needed according to your enviroment and your needs