Underground sprinklers function through means of basic electronic and hydraulic technology. Each valve and all of the sprinklers that will be activated by this valve are known as a zone. Upon activation, the solenoid, which sits on top of the valve is magnetized lifting a small stainless steel plunger in its center. By doing this, the activated (or raised) plunger allows air to escape from the top of a rubber diaphragm located in the center of the valve.
Houston Professional Lawn / Garden Sprinkler & Drainage Systems Installation