Solenoid Valve Connection

solenoid valve
A solenoid valve is an electromechanical valve for use with liquid or gas. The valve is controlled by an electric current through a solenoid coil.
A valve that uses an electromagnetic coil for actuation.
Valve that is actuated with a electromagnetic solenoid magnet. 2 possible variations, NC (naturally closed) which is closed when there is no current applied and NO (naturally open) which is open when no current is applied

connection
The placing of parts of an electric circuit in contact so that a current may flow
a relation between things or events (as in the case of one causing the other or sharing features with it); "there was a connection between eating that pickle and having that nightmare"
The action of linking one thing with another
A relationship in which a person, thing, or idea is linked or associated with something else
the state of being connected; "the connection between church and state is inescapable"
(usually plural) a person who is influential and to whom you are connected in some way (as by family or friendship); "he has powerful connections"