– Reversal of flow (backflow) due to a reduction in system pressure, which causes a negative or subatmospheric pressure to exist at a site in the water system.

– A unit of electrical current. The unit is used to specify the movement of electrical charge per unit time through a conductor.

– The rate at which water is applied to the turf or ornamental plantings. Also refers to the amount of water applied to a given area in one hour. (See also: Precipitation Rate )

– Describes how far around in a circular pattern a sprinkler will rotate or spray. (A sprinkler with a 90° arc would spray a quarter circle pattern.)

– A complete plan of an installed irrigation system designating valve, sprinkler and controller locations, routing of pipe and control wire. The plan includes all changes to the orig [..]

– The unwanted reverse flow of liquids in a piping system.

– A device installed between the point of connection and the sprinklers that is designed to prevent the backflow of contaminated water into the potable water supply.

Air gap – A backflow technique utilizing a physical separation or air gap between two piping systems or hydraulic devices. Atmospheric Vacuum Breaker (AVB) – An ant [..]

– Water polluted or contaminated by organic matter, salts or acids, or a combination thereof.

– A water emission device that applies water directly to the soil surface, or that throws water a short distance, on order of one foot, before water contacts the soil. Back to Top