North Carolina Administrative Code
Title 21 - OCCUPATIONAL LICENSING BOARDS AND COMMISSIONS
Chapter 23 - IRRIGATION CONTRACTORS'
Section .0400 - IRRIGATION DESIGN MINIMUM STANDARDS
Section 23 .0405 - MICROIRRIGATION
Current through Register Vol. 39, No. 6, September 16, 2024
For zones with microirrigation, when designing an irrigation system, an irrigation contractor shall:
(1) provide a means of filtration at the master valve to remove particulate matter;
(2) use separate microirrigation zones where differing plant water requirements and root zone depths make such zones practical;
(3) specify pressure-compensating devices to improve overall uniformity;
(4) specify pressure regulation upstream from the drip/microirrigation components to anticipate periodic increases in the pressure of municipal or community water sources when there is flushing or other maintenance on the water supply system. Pressure regulating devices may be omitted only when the maximum possible pressure is known to be lower than the maximum allowable pressure for all drip/microirrigation components; and
(5) use air release valves to minimize ingestion of soil and other contaminants into the emitters.
Authority
G.S.
89G-5;
Eff. July 1,
2011;
Pursuant to
G.S.
150B-21.3A, rule is necessary without
substantive public interest Eff. September 22, 2014;
Amended Eff.
November 1, 2016.
