A

Alternating Current (AC)

Alternating current describes the flow of charge that changes direction periodically. As a result, the...

Anti-Siphon Valve

An anti-siphon valve, usually plastic or brass, is used to control the flow of water...

Arc

The arc describes how far around in a circular pattern a sprinkler will rotate or...

Automatic Control Valve

Used in conjunction with an irrigation controller, an automatic control valve is a convenient, economical...

B

Backflow

Any unwanted flow of liquid in the reverse direction.

Backflow Preventer

A backflow preventer is a device installed between the point of connection and the sprinklers...

Ball Valve

A ball valve has a single arm or lever that requires a quarter turn to...

C

Check Valve

A check valve is a small device allowing water to flow in one direction only....

Controller

Also known as a timer, the controller is the part of an automatic sprinkler system...

D

Direct current (DC)

Direct current is a bit easier to understand than alternating current. Rather than oscillating back...

Distribution Uniformity

A measure of how evenly water is being applied across a field during irrigation, typically...

Drip Irrigation

Drip Irrigation is the most efficient water and nutrient delivery system for growing crops. It...

E

Evapotranspiration

The process by which water is transferred from the land to the atmosphere by evaporation...

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