Shopping cart is empty.

The purpose of the solenoid is to open and close the irrigation valve.  It does this when a 24VAC electrical current is sent from the irrigation controller and the electrical energy is converted to magnetic energy raising the plunger inside the solenoid opening the irrigation valve.  When the 24VAC electrical current is not being sent from the irrigation controller the plunger inside the solenoid is down causing the irrigation valve to be closed.