Sprinklers come in many brands, shapes, and sizes. The desired end result is to deliver water to your plants in the most efficient way possible. Here are a few types of sprinklers and their uses.
A riser is nothing more than a pipe sticking out of the ground with a nozzle on it. Risers are commonly used in planters. They are installed along walls, fences, and other out of the way places where they will not be a trip hazard.
Some of the economy popups are inexpensive pop ups with nozzle built as a part o the head. They can be purchased with an adjustable arc nozzle or fixed arc nozzle. The disadvantage of a built in nozzle is in order to change the size of nozzle the whole head has to be replaced. Other economy brands can receive a normal plastic nozzle that is replaceable.
A 4″ popup is mostly recommended for use in lawn applications. All sprinklers used in lawn applications should popup above the height of the grass for even coverage.
A 6″ popup is mostly recommended use for low ground covers, shrubs, and some turf applications. It might be necessary to move a head between shrubs to ensure coverage of a plant behind it.
A 12″ popup is recommended to use with ornamental grasses, in cases where the shrubs are taller, and sometimes in planters that are small in size but have annuals that are too tall for good coverage with a 6″ popup.
Popup rotors are recommended for coverage of large turf areas where you have the water pressure to accommodate them. Rotors need a higher water pressure than popups.
The minimum pressure recommended for a low pressure head to work efficiently would be around 30 PSI at the head.
A mid-range head will operate efficiently on 40-50 PSI at the head.
And a hi range range head needs 50-70 PSI at the head.