Sprinklers:

Sprinklers that spray in a fixed pattern are generally called sprays or spray heads. Sprays are not usually designed to operate at pressures above 30 lbf/in² (200 kPa), due to misting problems that may develop. Sprinklers are designed for a wide range of general field uses portable, semi-portable and solid set systems, to meet the demanding needs of modern, economic irrigation systems.Most irrigation sprinklers are functioned through electric and hydraulic technology and are grouped together in zones that can be collectively turned on and off by actuating a solenoid- controlled valve.Once installed it serves for many years maintenance free.