Glossary

Definitions of commonly used Terms in drip irrigation

The terms contained in this glossary are defined according to their most common use as they apply to drip irrigation and drip irrigation components, temperature sensors, temperature controllers and power controllers. Also included are terms used in the general discussion of thermodynamic theory, thermal systems and heat energy.

ANTI-SIPHON VALVE:

A valve, usually plastic or brass, used to control the flow of water in one direction. It will prevent a backflow of irrigation water into the main water supply for the house

AVB:

- Atmospheric Vacuum Breaker (backflow preventer)

DRIP SOAKER TAPE:

A thin walled dripline with drippers inserted into the line at preset spacings.

EARTHLINE BROWN PC™ DRIPLINE :

- 1/2" poly tubing with rigid walls that has PC drippers inserted at preset intervals

FHT:

Female Hose Thread

FNPT:

Female National Pipe Thread

GPH:

Gallons Per Hour. Used to measure the flow rate of low volume irrigation.

GPM:

Gallons Per Minute. Used to measure the flow rate of sprinkler heads / systems.

SOAKER HOSE:

A 1/4" micro tubing with in-line emitters at preset spacings.

MHT:

Male Hose Thread

MICRO TUBING:

1/4" and 1/8" vinyl or polyethylene tubing

MNPT:

Male National Pipe Thread

PC:

Pressure Compensating

PE:

Polyethylene tubing (poly tubing)

PSI:

Pounds per Square Inch in static or dynamic water pressure. Used to measure pressure. For example, the recommended operating pressure of a drip irrigation system is 25 PSI.

PVC:

Rigid plastic pipe

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