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<br />I <br /> <br />(6) Sprinkler heads must be installed in a manner that meets the needs of plants <br />at maturity Pop-up heads must be high enough to clear mature turf. <br /> <br />(7) Use of low-angle spray heads is encouraged where appropriate. <br /> <br />(8) Use of shrub risers is prohibited. Surface or subsurface drip irrigation, or low- <br />angle spray heads that direct water to the base of the plant may be used in lieu of shrub <br />risers. <br /> <br />(9) Landscape irrigation systems must be equipped with controllers capable of <br />providing multiple irrigation programs, with at least three start times per program. <br /> <br />(10) Landscape irrigation systems must be equipped with controllers capable of <br />limiting irrigation frequency to once every 7 days and once every 14 days. <br /> <br />(11) Landscape irrigation systems must be equipped with controllers that have a <br />water budgeting feature. <br /> <br />(12) Landscape irrigation systems must be equipped with a rain shutoff device or <br />soil-moisture shutoff device that delays or terminates irrigation when conditions warrant. <br /> <br />(13) Landscape irrigation systems must consist of separate irrigated zones based <br />on water requirements, so that turf and shrub areas, sun and shade areas, and flat and <br />sloping areas are watered separately. <br /> <br />I <br /> <br />(14) All landscape irrigation systems must have a master valve. <br /> <br />(15) All master valves must be equipped with an adjustable flow control <br /> <br />(16) All master valves must be enclosed in an accessible valve box. <br /> <br />(17) Check valves are required where elevation differences may result in low- <br />head drainage. Check valves may be located at the sprinkler head(s) or on the lateral <br />line. <br /> <br />(18) Landscape irrigation systems must be designed to the lowest static water <br />pressure in a 12 month period. If static pressure exceeds design pressure by 15 PSI or <br />more, the master valve must be equipped with a pressure regulating device. <br /> <br />(19) If pressure differences of more than 10% occur between valved zones, a <br />pressure regulating device must be installed on the high pressure zone(s) <br /> <br />(b) All new ICI and multi-family residential landscape irrigation systems must be <br />designed, installed and operated in accordance with the following additional <br />requirements: <br /> <br />I <br /> <br />(1) A separate metered water service must be utilized for the landscape irrigation <br />system. <br /> <br />(2) Landscape irrigation systems must be equipped with a flow meter that will <br />automatically shut down the irrigation system during excessive water flows. <br /> <br />19 <br />