Basically defined, a solenoid valve is an electromechanical valve that is designed to work in conjunction with either liquid or gas. When electric currents begin to run inside of a solenoid coil, the actual valve will start operating. The usual variety of solenoid valves contain two or more ports in total. Two-port valves are able to be turned on or off but three-port valves contain an outflow that is able to be transferred between the other two ports' outlets. Some devices will have several solenoid valves that are built together on a manifold. When the control device is operated by using fluidics, or the use of fluid in electrical operations, solenoid valves are commonly utilized. The fundamental tasks solenoid valves perform are mixing, distributing, dosing, releasing and shutting off the flow of fluids. Because solenoids switch quickly and safely, last for a long time, are highly compatible, require little power and are compact and durable, these valves are utilized in a wide variety of applications. Generally, solenoid valves consists of two essential parts - the valve itself and the actual solenoid. Some examples of applications in which solenoids are used are hydraulic systems and fluid-powered systems that have cylinders, fluid-powered motors and industrial valves. There are other applications, such as irrigation systems equipped with sprinklers, that require the utilization of a solenoid valve along with an automatic controller. Dishwashers, washing machines and other household appliances need a solenoid valve for controlling the amount of water that enters the machine. Yet another type of equipment in which a solenoid valve is used is the paintball gun. The solenoid valve inside of a paintball gun controls a larger valve; the larger valve is responsible for controlling the release of CO2, which is the gas that propels a paintball from the paintball gun's barrel.