21 NCAC 23 .0504. SYSTEM LAYOUT

(a)  An irrigation contractor shall install the irrigation system's components according to the design specifications and manufacturer's performance standards.

(b)  The spacing of microirrigation devices shall be selected to meet the maximum irrigation requirements of the plants being irrigated.  The flow rate of the microirrigation devices, soil types and plant types must all be considered in selecting the spacing of the microirrigation devices.

(c)  The maximum spacing between sprinklers must not exceed the radius listed in the manufacturer's specifications.

(d)  An irrigation contractor shall determine the radius by referring to the manufacturer's specifications for a sprinklers at a specific operating pressure.

(e)  Irrigation systems shall not spray water onto or over surfaces made of concrete, asphalt, brick, wood or any other continuous impervious material, such as walls, fences, sidewalks and streets. The irrigation system may spray water onto such surfaces due to irregularly-shaped hardscapes, wind drift or fixed spray patterns of sprinklers.

(f)  An irrigation contractor shall insure that no water is allowed to run off a site onto impervious surfaces where the water flows for a distance of more than 15 feet during any irrigation day or into a storm water inlet.

(g)  All irrigation systems shall use check valves and stronger springs to hold the water in the piping system.

(h)  When the irrigation contractor determines that water pressure at the head is too low to operate a sprinkler he shall correct this problem with a solution in accordance with Paragraph (a) of this Rule.

(i)  An irrigation contractor shall provide an irrigation schedule to the property owner or his agent that limits the amount of water applied in any one given time period.

 

History Note:        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.